On Wed Jun 10, 2026 at 12:04 PM CEST, Ashishkumar Parmar X (asparmar - E INFOCHIPS PRIVATE LIMITED at Cisco) via lists.openembedded.org wrote: > From: Ashishkumar Parmar <[email protected]> > > Pick the upstream 9.18 backport [1] for CVE-2026-1519. The public ISC > advisory [2] describes the vulnerability and identifies the fixed BIND > release.
Hello, I have not checked but bind is one of those rare project to have a stable branch that match our stable policy (I've already taken some upgrades). Instead of backporting CVE patches, why not trying to upgrade along the 9.18 branch? > > The upstream fix is split across the reproducer and validation commits. > Also include one prerequisite NSEC3 bounds-check commit that is required > before the validation changes can be applied cleanly and validated > safely on the downstream 9.18.44 source: > > - CVE-2026-1519_p1.patch [3] adds the upstream system-test reproducer > for excessive NSEC3 iterations at delegation. > - CVE-2026-1519-dependent.patch [4] adds the prerequisite NSEC3 > next_length bounds check in isdelegation(). This patch is not part of > the CVE merge commit, but it touches the same NSEC3 delegation path > and must be applied before the functional validation changes. > - CVE-2026-1519_p2.patch [5] adds the iteration-limit handling in > isdelegation(). > - CVE-2026-1519_p3.patch [6] avoids re-validating already trusted > rdatasets. > - CVE-2026-1519_p4.patch [7] checks RRset trust in > validate_neg_rrset(). > > Keep the patches split to preserve the upstream commit structure and to > make the SRC_URI ordering explicit. > > [1] > https://gitlab.com/isc-projects/bind9/-/commit/5ef459eeaa92222ad28d2186f5eae9a586dece70 > [2] https://kb.isc.org/docs/cve-2026-1519 > [3] > https://gitlab.com/isc-projects/bind9/-/commit/2c82f99a3c95f356861d5977f12ef9bbe2063cb6 > [4] > https://gitlab.com/isc-projects/bind9/-/commit/368c75a9f567f8b36cf24fefe45023e0a050e47b > [5] > https://gitlab.com/isc-projects/bind9/-/commit/85c21feff9acb0982fe60f2c88201bf55533bd0e > [6] > https://gitlab.com/isc-projects/bind9/-/commit/8890a91c1c16129333139b9d8a4381e0f741f0d6 > [7] > https://gitlab.com/isc-projects/bind9/-/commit/85fcd704e2f7cc2a25d2195bc4bb28398c889ed3 > > Signed-off-by: Ashishkumar Parmar <[email protected]> > --- > .../bind/bind/CVE-2026-1519-dependent.patch | 50 +++ > .../bind/bind/CVE-2026-1519_p1.patch | 341 ++++++++++++++++++ > .../bind/bind/CVE-2026-1519_p2.patch | 176 +++++++++ > .../bind/bind/CVE-2026-1519_p3.patch | 52 +++ > .../bind/bind/CVE-2026-1519_p4.patch | 59 +++ > .../recipes-connectivity/bind/bind_9.18.44.bb | 5 + > 6 files changed, 683 insertions(+) > create mode 100644 > meta/recipes-connectivity/bind/bind/CVE-2026-1519-dependent.patch > create mode 100644 meta/recipes-connectivity/bind/bind/CVE-2026-1519_p1.patch > create mode 100644 meta/recipes-connectivity/bind/bind/CVE-2026-1519_p2.patch > create mode 100644 meta/recipes-connectivity/bind/bind/CVE-2026-1519_p3.patch > create mode 100644 meta/recipes-connectivity/bind/bind/CVE-2026-1519_p4.patch > > diff --git > a/meta/recipes-connectivity/bind/bind/CVE-2026-1519-dependent.patch > b/meta/recipes-connectivity/bind/bind/CVE-2026-1519-dependent.patch > new file mode 100644 > index 0000000000..eff7a06d82 > --- /dev/null > +++ b/meta/recipes-connectivity/bind/bind/CVE-2026-1519-dependent.patch > @@ -0,0 +1,50 @@ > +From af8929ebe72ca8564882632e59999795c781ebd4 Mon Sep 17 00:00:00 2001 > +From: =?UTF-8?q?Ond=C5=99ej=20Sur=C3=BD?= <[email protected]> > +Date: Sat, 14 Feb 2026 14:43:41 +0100 > +Subject: [PATCH] Invalid NSEC3 can cause OOB read of the isdelegation() stack > + > +When .next_length is longer than NSEC3_MAX_HASH_LENGTH, it causes a > +harmless out-of-bound read of the isdelegation() stack. This patch > +fixes the issue by skipping NSEC3 records with an oversized hash length > +during validation. > + > +CVE: CVE-2026-1519 > +Upstream-Status: Backport > [https://gitlab.com/isc-projects/bind9/-/commit/368c75a9f567f8b36cf24fefe45023e0a050e47b] > + > +(cherry picked from commit 67b4fb56e40bf856e1fccd41e752d5f486b5b569) > +(cherry picked from commit 368c75a9f567f8b36cf24fefe45023e0a050e47b) > +Signed-off-by: Ashishkumar Parmar <[email protected]> > +--- > + lib/dns/rdata/generic/nsec3_50.c | 1 + > + lib/dns/validator.c | 3 +++ > + 2 files changed, 4 insertions(+) > + > +diff --git a/lib/dns/rdata/generic/nsec3_50.c > b/lib/dns/rdata/generic/nsec3_50.c > +index f45fe4dc33..e04587bd1b 100644 > +--- a/lib/dns/rdata/generic/nsec3_50.c > ++++ b/lib/dns/rdata/generic/nsec3_50.c > +@@ -324,6 +324,7 @@ tostruct_nsec3(ARGS_TOSTRUCT) { > + } > + > + nsec3->mctx = mctx; > ++ > + return ISC_R_SUCCESS; > + > + cleanup: > +diff --git a/lib/dns/validator.c b/lib/dns/validator.c > +index 809b7be911..9ec13581ab 100644 > +--- a/lib/dns/validator.c > ++++ b/lib/dns/validator.c > +@@ -339,6 +339,9 @@ trynsec3: > + if (nsec3.hash != 1) { > + continue; > + } > ++ if (nsec3.next_length > NSEC3_MAX_HASH_LENGTH) { > ++ continue; > ++ } > + length = isc_iterated_hash( > + hash, nsec3.hash, nsec3.iterations, nsec3.salt, > + nsec3.salt_length, name->ndata, name->length); > +-- > +2.35.6 > + > diff --git a/meta/recipes-connectivity/bind/bind/CVE-2026-1519_p1.patch > b/meta/recipes-connectivity/bind/bind/CVE-2026-1519_p1.patch > new file mode 100644 > index 0000000000..f78af9da11 > --- /dev/null > +++ b/meta/recipes-connectivity/bind/bind/CVE-2026-1519_p1.patch > @@ -0,0 +1,341 @@ > +From 81f8acc4bdf84eec6f53a65709b61ad3d963b4f7 Mon Sep 17 00:00:00 2001 > +From: =?UTF-8?q?Nicki=20K=C5=99=C3=AD=C5=BEek?= <[email protected]> > +Date: Tue, 3 Feb 2026 18:25:04 +0100 > +Subject: [PATCH] Reproducer for CVE-2026-1519 > + > +When a validating resolver processes a delegation from a DNSSEC-signed > +zone which uses too many NSEC3 iterations, it should cease the attempt > +to validate due to an NSEC3 iteration limit being exceeded and fall back > +to insecure. > + > +CVE: CVE-2026-1519 > +Upstream-Status: Backport > [https://gitlab.com/isc-projects/bind9/-/commit/2c82f99a3c95f356861d5977f12ef9bbe2063cb6] > + > +(cherry picked from commit 9bc14a89f1313aa38330e84674ac3b7691db3383) > +(cherry picked from commit 2c82f99a3c95f356861d5977f12ef9bbe2063cb6) > +Signed-off-by: Ashishkumar Parmar <[email protected]> > +--- > + .../system/nsec3-delegation/ns1/named.conf.j2 | 35 +++++++++++ > + bin/tests/system/nsec3-delegation/ns1/root.db | 25 ++++++++ > + .../ns2/iter-too-many.db.j2.manual | 31 ++++++++++ > + .../system/nsec3-delegation/ns2/named.conf.j2 | 40 ++++++++++++ > + .../nsec3-delegation/ns2/sub.iter-too-many.db | 24 ++++++++ > + .../system/nsec3-delegation/ns3/named.conf.j2 | 37 +++++++++++ > + .../nsec3-delegation/ns3/trusted.conf.j2 | 1 + > + .../tests_excessive_nsec3_iterations.py | 61 +++++++++++++++++++ > + 8 files changed, 254 insertions(+) > + create mode 100644 bin/tests/system/nsec3-delegation/ns1/named.conf.j2 > + create mode 100644 bin/tests/system/nsec3-delegation/ns1/root.db > + create mode 100644 > bin/tests/system/nsec3-delegation/ns2/iter-too-many.db.j2.manual > + create mode 100644 bin/tests/system/nsec3-delegation/ns2/named.conf.j2 > + create mode 100644 > bin/tests/system/nsec3-delegation/ns2/sub.iter-too-many.db > + create mode 100644 bin/tests/system/nsec3-delegation/ns3/named.conf.j2 > + create mode 120000 bin/tests/system/nsec3-delegation/ns3/trusted.conf.j2 > + create mode 100644 > bin/tests/system/nsec3-delegation/tests_excessive_nsec3_iterations.py > + > +diff --git a/bin/tests/system/nsec3-delegation/ns1/named.conf.j2 > b/bin/tests/system/nsec3-delegation/ns1/named.conf.j2 > +new file mode 100644 > +index 0000000000..65016d1c67 > +--- /dev/null > ++++ b/bin/tests/system/nsec3-delegation/ns1/named.conf.j2 > +@@ -0,0 +1,35 @@ > ++/* > ++ * Copyright (C) Internet Systems Consortium, Inc. ("ISC") > ++ * > ++ * SPDX-License-Identifier: MPL-2.0 > ++ * > ++ * This Source Code Form is subject to the terms of the Mozilla Public > ++ * License, v. 2.0. If a copy of the MPL was not distributed with this > ++ * file, you can obtain one at https://mozilla.org/MPL/2.0/. > ++ * > ++ * See the COPYRIGHT file distributed with this work for additional > ++ * information regarding copyright ownership. > ++ */ > ++ > ++options { > ++ query-source address 10.53.0.1; > ++ notify-source 10.53.0.1; > ++ transfer-source 10.53.0.1; > ++ port @PORT@; > ++ pid-file "named.pid"; > ++ listen-on { 10.53.0.1; }; > ++ listen-on-v6 { none; }; > ++ recursion no; > ++ dnssec-validation no; > ++}; > ++ > ++controls { > ++ inet 10.53.0.1 port @CONTROLPORT@ allow { any; } keys { rndc_key; }; > ++}; > ++ > ++include "../../_common/rndc.key"; > ++ > ++zone "." { > ++ type primary; > ++ file "root.db"; > ++}; > +diff --git a/bin/tests/system/nsec3-delegation/ns1/root.db > b/bin/tests/system/nsec3-delegation/ns1/root.db > +new file mode 100644 > +index 0000000000..c3f80d0d4b > +--- /dev/null > ++++ b/bin/tests/system/nsec3-delegation/ns1/root.db > +@@ -0,0 +1,25 @@ > ++; Copyright (C) Internet Systems Consortium, Inc. ("ISC") > ++; > ++; SPDX-License-Identifier: MPL-2.0 > ++; > ++; This Source Code Form is subject to the terms of the Mozilla Public > ++; License, v. 2.0. If a copy of the MPL was not distributed with this > ++; file, you can obtain one at https://mozilla.org/MPL/2.0/. > ++; > ++; See the COPYRIGHT file distributed with this work for additional > ++; information regarding copyright ownership. > ++ > ++$TTL 300 > ++. IN SOA . . ( > ++ 2025063000 ; serial > ++ 600 ; refresh > ++ 600 ; retry > ++ 1200 ; expire > ++ 600 ; minimum > ++ ) > ++. NS a.root-servers.nil. > ++ > ++a.root-servers.nil A 10.53.0.1 > ++ > ++iter-too-many. NS ns2.iter-too-many. > ++ns2.iter-too-many. A 10.53.0.2 > +diff --git > a/bin/tests/system/nsec3-delegation/ns2/iter-too-many.db.j2.manual > b/bin/tests/system/nsec3-delegation/ns2/iter-too-many.db.j2.manual > +new file mode 100644 > +index 0000000000..fa5023d21b > +--- /dev/null > ++++ b/bin/tests/system/nsec3-delegation/ns2/iter-too-many.db.j2.manual > +@@ -0,0 +1,31 @@ > ++; Copyright (C) Internet Systems Consortium, Inc. ("ISC") > ++; > ++; SPDX-License-Identifier: MPL-2.0 > ++; > ++; This Source Code Form is subject to the terms of the Mozilla Public > ++; License, v. 2.0. If a copy of the MPL was not distributed with this > ++; file, you can obtain one at https://mozilla.org/MPL/2.0/. > ++; > ++; See the COPYRIGHT file distributed with this work for additional > ++; information regarding copyright ownership. > ++ > ++{% raw %} > ++$TTL 300 > ++@ IN SOA ns2.iter-too-many. hostmaster.iter-too-many. ( > ++ 2026020300 ; serial > ++ 20 ; refresh (20 seconds) > ++ 20 ; retry (20 seconds) > ++ 1814400 ; expire (3 weeks) > ++ 3600 ; minimum (1 hour) > ++) > ++ > ++@ IN NS ns2.iter-too-many. > ++ns2 IN A 10.53.0.2 > ++ > ++sub IN NS ns2.sub.iter-too-many. > ++ns2.sub IN A 10.53.0.2 > ++{% endraw %} > ++ > ++{% for dnskey in dnskeys %} > ++@dnskey@ > ++{% endfor %} > +diff --git a/bin/tests/system/nsec3-delegation/ns2/named.conf.j2 > b/bin/tests/system/nsec3-delegation/ns2/named.conf.j2 > +new file mode 100644 > +index 0000000000..2f4823574f > +--- /dev/null > ++++ b/bin/tests/system/nsec3-delegation/ns2/named.conf.j2 > +@@ -0,0 +1,40 @@ > ++/* > ++ * Copyright (C) Internet Systems Consortium, Inc. ("ISC") > ++ * > ++ * SPDX-License-Identifier: MPL-2.0 > ++ * > ++ * This Source Code Form is subject to the terms of the Mozilla Public > ++ * License, v. 2.0. If a copy of the MPL was not distributed with this > ++ * file, you can obtain one at https://mozilla.org/MPL/2.0/. > ++ * > ++ * See the COPYRIGHT file distributed with this work for additional > ++ * information regarding copyright ownership. > ++ */ > ++ > ++options { > ++ query-source address 10.53.0.2; > ++ notify-source 10.53.0.2; > ++ transfer-source 10.53.0.2; > ++ port @PORT@; > ++ pid-file "named.pid"; > ++ listen-on { 10.53.0.2; }; > ++ listen-on-v6 { none; }; > ++ recursion no; > ++ dnssec-validation no; > ++}; > ++ > ++controls { > ++ inet 10.53.0.2 port @CONTROLPORT@ allow { any; } keys { rndc_key; }; > ++}; > ++ > ++include "../../_common/rndc.key"; > ++ > ++zone "iter-too-many" { > ++ type primary; > ++ file "iter-too-many.signed.db"; > ++}; > ++ > ++zone "sub.iter-too-many" { > ++ type primary; > ++ file "sub.iter-too-many.db"; > ++}; > +diff --git a/bin/tests/system/nsec3-delegation/ns2/sub.iter-too-many.db > b/bin/tests/system/nsec3-delegation/ns2/sub.iter-too-many.db > +new file mode 100644 > +index 0000000000..09b2bb6fb3 > +--- /dev/null > ++++ b/bin/tests/system/nsec3-delegation/ns2/sub.iter-too-many.db > +@@ -0,0 +1,24 @@ > ++; Copyright (C) Internet Systems Consortium, Inc. ("ISC") > ++; > ++; SPDX-License-Identifier: MPL-2.0 > ++; > ++; This Source Code Form is subject to the terms of the Mozilla Public > ++; License, v. 2.0. If a copy of the MPL was not distributed with this > ++; file, you can obtain one at https://mozilla.org/MPL/2.0/. > ++; > ++; See the COPYRIGHT file distributed with this work for additional > ++; information regarding copyright ownership. > ++ > ++$TTL 300 > ++@ IN SOA ns2.sub.iter-too-many. > hostmaster.sub.iter-too-many. ( > ++ 2026020300 ; serial > ++ 20 ; refresh (20 seconds) > ++ 20 ; retry (20 seconds) > ++ 1814400 ; expire (3 weeks) > ++ 3600 ; minimum (1 hour) > ++) > ++ > ++@ IN NS ns2.sub.iter-too-many. > ++ns2 IN A 10.53.0.2 > ++ > ++example IN A 127.0.0.1 > +diff --git a/bin/tests/system/nsec3-delegation/ns3/named.conf.j2 > b/bin/tests/system/nsec3-delegation/ns3/named.conf.j2 > +new file mode 100644 > +index 0000000000..e36b88c53e > +--- /dev/null > ++++ b/bin/tests/system/nsec3-delegation/ns3/named.conf.j2 > +@@ -0,0 +1,37 @@ > ++/* > ++ * Copyright (C) Internet Systems Consortium, Inc. ("ISC") > ++ * > ++ * SPDX-License-Identifier: MPL-2.0 > ++ * > ++ * This Source Code Form is subject to the terms of the Mozilla Public > ++ * License, v. 2.0. If a copy of the MPL was not distributed with this > ++ * file, you can obtain one at https://mozilla.org/MPL/2.0/. > ++ * > ++ * See the COPYRIGHT file distributed with this work for additional > ++ * information regarding copyright ownership. > ++ */ > ++ > ++options { > ++ query-source address 10.53.0.3; > ++ notify-source 10.53.0.3; > ++ transfer-source 10.53.0.3; > ++ port @PORT@; > ++ pid-file "named.pid"; > ++ listen-on { 10.53.0.3; }; > ++ listen-on-v6 { none; }; > ++ recursion yes; > ++ dnssec-validation yes; > ++}; > ++ > ++controls { > ++ inet 10.53.0.3 port @CONTROLPORT@ allow { any; } keys { rndc_key; }; > ++}; > ++ > ++include "../../_common/rndc.key"; > ++ > ++zone "." { > ++ type hint; > ++ file "../../_common/root.hint"; > ++}; > ++ > ++include "trusted.conf"; > +diff --git a/bin/tests/system/nsec3-delegation/ns3/trusted.conf.j2 > b/bin/tests/system/nsec3-delegation/ns3/trusted.conf.j2 > +new file mode 120000 > +index 0000000000..cb0be77b22 > +--- /dev/null > ++++ b/bin/tests/system/nsec3-delegation/ns3/trusted.conf.j2 > +@@ -0,0 +1 @@ > ++../../_common/trusted.conf.j2 > +\ No newline at end of file > +diff --git > a/bin/tests/system/nsec3-delegation/tests_excessive_nsec3_iterations.py > b/bin/tests/system/nsec3-delegation/tests_excessive_nsec3_iterations.py > +new file mode 100644 > +index 0000000000..f85384bb1e > +--- /dev/null > ++++ b/bin/tests/system/nsec3-delegation/tests_excessive_nsec3_iterations.py > +@@ -0,0 +1,61 @@ > ++# Copyright (C) Internet Systems Consortium, Inc. ("ISC") > ++# > ++# SPDX-License-Identifier: MPL-2.0 > ++# > ++# This Source Code Form is subject to the terms of the Mozilla Public > ++# License, v. 2.0. If a copy of the MPL was not distributed with this > ++# file, you can obtain one at https://mozilla.org/MPL/2.0/. > ++# > ++# See the COPYRIGHT file distributed with this work for additional > ++# information regarding copyright ownership. > ++ > ++from isctest.run import EnvCmd > ++ > ++import isctest > ++ > ++ > ++def bootstrap(): > ++ templates = isctest.template.TemplateEngine(".") > ++ keygen = EnvCmd("KEYGEN", "-a ECDSA256") > ++ signer = EnvCmd("SIGNER") > ++ > ++ isctest.log.info("setup iter-too-many.") > ++ zonename = "iter-too-many." > ++ ksk_name = keygen(f"-f KSK {zonename}", cwd="ns2").out.strip() > ++ zsk_name = keygen(f"{zonename}", cwd="ns2").out.strip() > ++ ksk = isctest.kasp.Key(ksk_name, keydir="ns2") > ++ zsk = isctest.kasp.Key(zsk_name, keydir="ns2") > ++ dnskeys = [ksk.dnskey, zsk.dnskey] > ++ > ++ tdata = { > ++ "dnskeys": dnskeys, > ++ } > ++ templates.render(f"ns2/{zonename}db", tdata, > template=f"ns2/{zonename}db.j2.manual") > ++ signer( > ++ f"-P -o {zonename} -f {zonename}signed.db -3 A1B2C3D4 -H too-many > -H 151 -S {zonename}db", > ++ cwd="ns2", > ++ ) > ++ > ++ return { > ++ "trust_anchors": [ > ++ ksk.into_ta("static-key"), > ++ ], > ++ } > ++ > ++ > ++def test_excessive_nsec3_iterations_delegation(ns3): > ++ # reproducer for CVE-2026-1519 [GL#5708] > ++ zone = "example.sub.iter-too-many" > ++ msg = isctest.query.create(zone, "A") > ++ res = isctest.query.tcp(msg, ns3.ip) > ++ > ++ # an insecure response is expected regardless of the NSEC3 iteration > limit, > ++ # because the sub.iter-too-many. zone is unsigned. the real difference > is > ++ # in the CPU usage required for generating such response, but that > can't be > ++ # easily and reliably tested in an automated fashion > ++ isctest.check.noerror(res) > ++ > ++ with ns3.watch_log_from_start() as watcher: > ++ watcher.wait_for_line( > ++ f"validating {zone}/A: validator_callback_ds: too many > iterations" > ++ ) > +-- > +2.35.6 > + > diff --git a/meta/recipes-connectivity/bind/bind/CVE-2026-1519_p2.patch > b/meta/recipes-connectivity/bind/bind/CVE-2026-1519_p2.patch > new file mode 100644 > index 0000000000..ee033b4b91 > --- /dev/null > +++ b/meta/recipes-connectivity/bind/bind/CVE-2026-1519_p2.patch > @@ -0,0 +1,176 @@ > +From e77c45ddae1ca87058244978868b6489610ca136 Mon Sep 17 00:00:00 2001 > +From: Matthijs Mekking <[email protected]> > +Date: Tue, 3 Mar 2026 10:40:36 +0100 > +Subject: [PATCH] Check iterations in isdelegation() > + > +When looking up an NSEC3 as part of an insecurity proof, check the > +number of iterations. If this is too high, treat the answer as insecure > +by marking the answer with trust level "answer", indicating that they > +did not validate, but could be cached as insecure. > + > +CVE: CVE-2026-1519 > +Upstream-Status: Backport > [https://gitlab.com/isc-projects/bind9/-/commit/85c21feff9acb0982fe60f2c88201bf55533bd0e] > + > +(cherry picked from commit 988040a5e02f86f4a8cdb0704e8d501f9082a89c) > +(cherry picked from commit 85c21feff9acb0982fe60f2c88201bf55533bd0e) > +Signed-off-by: Ashishkumar Parmar <[email protected]> > +--- > + lib/dns/validator.c | 64 +++++++++++++++++++++++++++++++++------------ > + 1 file changed, 48 insertions(+), 16 deletions(-) > + > +diff --git a/lib/dns/validator.c b/lib/dns/validator.c > +index 9ec13581ab..179b6590b5 100644 > +--- a/lib/dns/validator.c > ++++ b/lib/dns/validator.c > +@@ -256,12 +256,25 @@ exit_check(dns_validator_t *val) { > + } > + > + /*% > +- * Look in the NSEC record returned from a DS query to see if there is > +- * a NS RRset at this name. If it is found we are at a delegation point. > ++ * The isdelegation() function is called as part of seeking the DS record. > ++ * Look in the NSEC or NSEC3 record returned from a DS query to see if the > ++ * record has the NS bitmap set. If so, we are at a delegation point. > ++ * > ++ * If the response contains NSEC3 records with too high iterations, we > cannot > ++ * (or rather we are not going to) validate the insecurity proof. Instead we > ++ * are going to treat the message as insecure and just assume the DS was at > ++ * the delegation. > ++ * > ++ * Returns: > ++ *\li #ISC_R_SUCCESS the NS bitmap was set in the NSEC or NSEC3 > record, or > ++ * the NSEC3 covers the name (in case of opt-out), or > ++ * we cannot validate the insecurity proof and are going > ++ * to treat the message as isnecure. > ++ *\li #ISC_R_NOTFOUND the NS bitmap was not set, > + */ > +-static bool > +-isdelegation(dns_name_t *name, dns_rdataset_t *rdataset, > +- isc_result_t dbresult) { > ++static isc_result_t > ++isdelegation(dns_validator_t *val, dns_name_t *name, dns_rdataset_t > *rdataset, > ++ isc_result_t dbresult, const char *caller) { > + dns_fixedname_t fixed; > + dns_label_t hashlabel; > + dns_name_t nsec3name; > +@@ -289,7 +302,7 @@ isdelegation(dns_name_t *name, dns_rdataset_t *rdataset, > + goto trynsec3; > + } > + if (result != ISC_R_SUCCESS) { > +- return false; > ++ return ISC_R_NOTFOUND; > + } > + } > + > +@@ -303,7 +316,7 @@ isdelegation(dns_name_t *name, dns_rdataset_t *rdataset, > + dns_rdata_reset(&rdata); > + } > + dns_rdataset_disassociate(&set); > +- return found; > ++ return found ? ISC_R_SUCCESS : ISC_R_NOTFOUND; > + > + trynsec3: > + /* > +@@ -342,6 +355,18 @@ trynsec3: > + if (nsec3.next_length > NSEC3_MAX_HASH_LENGTH) { > + continue; > + } > ++ /* > ++ * If there are too many iterations assume bad things > ++ * are happening and bail out early. Treat as if the > ++ * DS was at the delegation. > ++ */ > ++ if (nsec3.iterations > DNS_NSEC3_MAXITERATIONS) { > ++ validator_log(val, ISC_LOG_DEBUG(3), > ++ "%s: too many iterations", > ++ caller); > ++ dns_rdataset_disassociate(&set); > ++ return ISC_R_SUCCESS; > ++ } > + length = isc_iterated_hash( > + hash, nsec3.hash, nsec3.iterations, nsec3.salt, > + nsec3.salt_length, name->ndata, name->length); > +@@ -353,7 +378,7 @@ trynsec3: > + found = dns_nsec3_typepresent(&rdata, > + dns_rdatatype_ns); > + dns_rdataset_disassociate(&set); > +- return found; > ++ return found ? ISC_R_SUCCESS : ISC_R_NOTFOUND; > + } > + if ((nsec3.flags & DNS_NSEC3FLAG_OPTOUT) == 0) { > + continue; > +@@ -369,12 +394,12 @@ trynsec3: > + memcmp(hash, nsec3.next, length) < 0))) > + { > + dns_rdataset_disassociate(&set); > +- return true; > ++ return ISC_R_SUCCESS; > + } > + } > + dns_rdataset_disassociate(&set); > + } > +- return found; > ++ return found ? ISC_R_SUCCESS : ISC_R_NOTFOUND; > + } > + > + /*% > +@@ -590,8 +615,9 @@ fetch_callback_ds(isc_task_t *task, isc_event_t *event) { > + } else if (eresult == DNS_R_SERVFAIL) { > + goto unexpected; > + } else if (eresult != DNS_R_CNAME && > +- isdelegation(devent->foundname, &val->frdataset, > +- eresult)) > ++ isdelegation(val, devent->foundname, &val->frdataset, > ++ eresult, > ++ "fetch_callback_ds") == ISC_R_SUCCESS) > + { > + /* > + * Failed to find a DS while trying to prove > +@@ -755,10 +781,13 @@ validator_callback_ds(isc_task_t *task, isc_event_t > *event) { > + dns_trust_totext(val->frdataset.trust)); > + have_dsset = (val->frdataset.type == dns_rdatatype_ds); > + name = dns_fixedname_name(&val->fname); > ++ > + if ((val->attributes & VALATTR_INSECURITY) != 0 && > + val->frdataset.covers == dns_rdatatype_ds && > + NEGATIVE(&val->frdataset) && > +- isdelegation(name, &val->frdataset, DNS_R_NCACHENXRRSET)) > ++ isdelegation(val, name, &val->frdataset, > ++ DNS_R_NCACHENXRRSET, > ++ "validator_callback_ds") == ISC_R_SUCCESS) > + { > + result = markanswer(val, "validator_callback_ds", > + "no DS and this is a delegation"); > +@@ -2590,7 +2619,8 @@ validate_nx(dns_validator_t *val, bool resume) { > + result = findnsec3proofs(val); > + if (result == DNS_R_NSEC3ITERRANGE) { > + validator_log(val, ISC_LOG_DEBUG(3), > +- "too many iterations"); > ++ "%s: too many iterations", > ++ __func__); > + markanswer(val, "validate_nx (3)", NULL); > + return ISC_R_SUCCESS; > + } > +@@ -2626,7 +2656,7 @@ validate_nx(dns_validator_t *val, bool resume) { > + result = findnsec3proofs(val); > + if (result == DNS_R_NSEC3ITERRANGE) { > + validator_log(val, ISC_LOG_DEBUG(3), > +- "too many iterations"); > ++ "%s: too many iterations", __func__); > + markanswer(val, "validate_nx (4)", NULL); > + return ISC_R_SUCCESS; > + } > +@@ -2833,7 +2863,9 @@ seek_ds(dns_validator_t *val, isc_result_t *resp) { > + return ISC_R_COMPLETE; > + } > + > +- if (isdelegation(tname, &val->frdataset, result)) { > ++ result = isdelegation(val, tname, &val->frdataset, result, > ++ "seek_ds"); > ++ if (result == ISC_R_SUCCESS) { > + *resp = markanswer(val, "seek_ds (3)", > + "this is a delegation"); > + return ISC_R_COMPLETE; > +-- > +2.35.6 > + > diff --git a/meta/recipes-connectivity/bind/bind/CVE-2026-1519_p3.patch > b/meta/recipes-connectivity/bind/bind/CVE-2026-1519_p3.patch > new file mode 100644 > index 0000000000..0473f40752 > --- /dev/null > +++ b/meta/recipes-connectivity/bind/bind/CVE-2026-1519_p3.patch > @@ -0,0 +1,52 @@ > +From 87c7c1aa7c648f15d57810afb198db709aa08ad3 Mon Sep 17 00:00:00 2001 > +From: Matthijs Mekking <[email protected]> > +Date: Tue, 3 Mar 2026 11:17:25 +0100 > +Subject: [PATCH] Don't verify already trusted rdatasets > + > +If we already marked an rdataset as secure (or it has even stronger > +trust), there is no need to cryptographically verify it again. > + > +CVE: CVE-2026-1519 > +Upstream-Status: Backport > [https://gitlab.com/isc-projects/bind9/-/commit/8890a91c1c16129333139b9d8a4381e0f741f0d6] > + > +(cherry picked from commit 0ec08c212022d08c9717f2bc6bd3e8ebd6f034ce) > +(cherry picked from commit 8890a91c1c16129333139b9d8a4381e0f741f0d6) > +Signed-off-by: Ashishkumar Parmar <[email protected]> > +--- > + lib/dns/include/dns/types.h | 1 + > + lib/dns/validator.c | 7 +++++++ > + 2 files changed, 8 insertions(+) > + > +diff --git a/lib/dns/include/dns/types.h b/lib/dns/include/dns/types.h > +index 8ddcbeb4e2..bd9623058a 100644 > +--- a/lib/dns/include/dns/types.h > ++++ b/lib/dns/include/dns/types.h > +@@ -352,6 +352,7 @@ enum { > + ((x) == dns_trust_additional || (x) == dns_trust_pending_additional) > + #define DNS_TRUST_GLUE(x) ((x) == dns_trust_glue) > + #define DNS_TRUST_ANSWER(x) ((x) == dns_trust_answer) > ++#define DNS_TRUST_SECURE(x) ((x) >= dns_trust_secure) > + > + /*% > + * Name checking severities. > +diff --git a/lib/dns/validator.c b/lib/dns/validator.c > +index 179b6590b5..47efd3940f 100644 > +--- a/lib/dns/validator.c > ++++ b/lib/dns/validator.c > +@@ -1523,6 +1523,13 @@ verify(dns_validator_t *val, dst_key_t *key, > dns_rdata_t *rdata, > + bool ignore = false; > + dns_name_t *wild; > + > ++ if (DNS_TRUST_SECURE(val->event->rdataset->trust)) { > ++ /* > ++ * This RRset was already verified before. > ++ */ > ++ return ISC_R_SUCCESS; > ++ } > ++ > + val->attributes |= VALATTR_TRIEDVERIFY; > + wild = dns_fixedname_initname(&fixed); > + again: > +-- > +2.35.6 > + > diff --git a/meta/recipes-connectivity/bind/bind/CVE-2026-1519_p4.patch > b/meta/recipes-connectivity/bind/bind/CVE-2026-1519_p4.patch > new file mode 100644 > index 0000000000..fd5d1afcd7 > --- /dev/null > +++ b/meta/recipes-connectivity/bind/bind/CVE-2026-1519_p4.patch > @@ -0,0 +1,59 @@ > +From 52b1997275768884d46c648b40f2ea625c386d17 Mon Sep 17 00:00:00 2001 > +From: Matthijs Mekking <[email protected]> > +Date: Tue, 3 Mar 2026 11:43:23 +0100 > +Subject: [PATCH] Check RRset trust in validate_neg_rrset() > + > +In many places we only create a validator if the RRset has too low > +trust (the RRset is pending validation, or could not be validated > +before). This check was missing prior to validating negative response > +data. > + > +CVE: CVE-2026-1519 > +Upstream-Status: Backport > [https://gitlab.com/isc-projects/bind9/-/commit/85fcd704e2f7cc2a25d2195bc4bb28398c889ed3] > + > +(cherry picked from commit 6ca67f65cd685cf8699540a852c1e3775bd48d64) > +(cherry picked from commit 85fcd704e2f7cc2a25d2195bc4bb28398c889ed3) > +Signed-off-by: Ashishkumar Parmar <[email protected]> > +--- > + lib/dns/validator.c | 17 +++++++++++++---- > + 1 file changed, 13 insertions(+), 4 deletions(-) > + > +diff --git a/lib/dns/validator.c b/lib/dns/validator.c > +index 47efd3940f..7db102062b 100644 > +--- a/lib/dns/validator.c > ++++ b/lib/dns/validator.c > +@@ -2463,6 +2463,17 @@ validate_neg_rrset(dns_validator_t *val, dns_name_t > *name, > + } > + } > + > ++ if (rdataset->type != dns_rdatatype_nsec && > ++ DNS_TRUST_SECURE(rdataset->trust)) > ++ { > ++ /* > ++ * The negative response data is already verified. > ++ * We skip NSEC records, because they require special > ++ * processing in validator_callback_nsec(). > ++ */ > ++ return DNS_R_CONTINUE; > ++ } > ++ > + val->currentset = rdataset; > + result = create_validator(val, name, rdataset->type, rdataset, > + sigrdataset, validator_callback_nsec, > +@@ -2573,11 +2584,9 @@ validate_ncache(dns_validator_t *val, bool resume) { > + } > + > + result = validate_neg_rrset(val, name, rdataset, sigrdataset); > +- if (result == DNS_R_CONTINUE) { > +- continue; > ++ if (result != DNS_R_CONTINUE) { > ++ return result; > + } > +- > +- return result; > + } > + if (result == ISC_R_NOMORE) { > + result = ISC_R_SUCCESS; > +-- > +2.35.6 > + > diff --git a/meta/recipes-connectivity/bind/bind_9.18.44.bb > b/meta/recipes-connectivity/bind/bind_9.18.44.bb > index d424edcb4e..9c8b73dccc 100644 > --- a/meta/recipes-connectivity/bind/bind_9.18.44.bb > +++ b/meta/recipes-connectivity/bind/bind_9.18.44.bb > @@ -18,6 +18,11 @@ SRC_URI = > "https://ftp.isc.org/isc/bind9/${PV}/${BPN}-${PV}.tar.xz \ > file://bind-ensure-searching-for-json-headers-searches-sysr.patch > \ > file://0001-named-lwresd-V-and-start-log-hide-build-options.patch > \ > file://0001-avoid-start-failure-with-bind-user.patch \ > + file://CVE-2026-1519_p1.patch \ > + file://CVE-2026-1519-dependent.patch \ > + file://CVE-2026-1519_p2.patch \ > + file://CVE-2026-1519_p3.patch \ > + file://CVE-2026-1519_p4.patch \ > " > > SRC_URI[sha256sum] = > "81f5035a25c576af1a93f0061cf70bde6d00a0c7bd1274abf73f5b5389a6f82d" -- Yoann Congal Smile ECS
-=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#239654): https://lists.openembedded.org/g/openembedded-core/message/239654 Mute This Topic: https://lists.openembedded.org/mt/119737287/21656 Group Owner: [email protected] Unsubscribe: https://lists.openembedded.org/g/openembedded-core/unsub [[email protected]] -=-=-=-=-=-=-=-=-=-=-=-
