On Sun Jan 25, 2026 at 10:40 AM CET, Ankur Tyagi via lists.openembedded.org
wrote:
> From: Ankur Tyagi <[email protected]>
>
> Backport the patch[1] from the PR[2] mentioned in the nvd[3].
>
> [1]
> https://github.com/avahi/avahi/commit/2d48e42d44a183f26a4d12d1f5d41abb9b7c6355
> [2] https://github.com/avahi/avahi/pull/806
> [3] https://nvd.nist.gov/vuln/detail/CVE-2025-68276
>
> Dropped CI changes from the original PR during backport.
>
> Signed-off-by: Ankur Tyagi <[email protected]>
> ---
> meta/recipes-connectivity/avahi/avahi_0.8.bb | 1 +
> .../avahi/files/CVE-2025-68276.patch | 65 +++++++++++++++++++
> 2 files changed, 66 insertions(+)
> create mode 100644 meta/recipes-connectivity/avahi/files/CVE-2025-68276.patch
Hello,
Thank you for the patch. As far as I can tell, a fix for CVE-2025-68276
is also needed for whinlatter. Can you send a fix there as well?
Thanks!
>
> diff --git a/meta/recipes-connectivity/avahi/avahi_0.8.bb
> b/meta/recipes-connectivity/avahi/avahi_0.8.bb
> index 7930bd3037..bb20fd17cc 100644
> --- a/meta/recipes-connectivity/avahi/avahi_0.8.bb
> +++ b/meta/recipes-connectivity/avahi/avahi_0.8.bb
> @@ -37,6 +37,7 @@ SRC_URI =
> "${GITHUB_BASE_URI}/download/v${PV}/avahi-${PV}.tar.gz \
> file://CVE-2023-38473.patch \
> file://CVE-2024-52616.patch \
> file://CVE-2024-52615.patch \
> + file://CVE-2025-68276.patch \
> "
>
> GITHUB_BASE_URI = "https://github.com/avahi/avahi/releases/";
> diff --git a/meta/recipes-connectivity/avahi/files/CVE-2025-68276.patch
> b/meta/recipes-connectivity/avahi/files/CVE-2025-68276.patch
> new file mode 100644
> index 0000000000..75169419f1
> --- /dev/null
> +++ b/meta/recipes-connectivity/avahi/files/CVE-2025-68276.patch
> @@ -0,0 +1,65 @@
> +From 8ec85459d8e6e59cc14457e16fb7ba171901f90e Mon Sep 17 00:00:00 2001
> +From: Evgeny Vereshchagin <[email protected]>
> +Date: Wed, 17 Dec 2025 08:11:23 +0000
> +Subject: [PATCH] core: refuse to create wide-area record browsers when
> + wide-area is off
> +
> +It fixes a bug where it was possible for unprivileged local users to
> +crash avahi-daemon (with wide-area disabled) by creating record browsers
> +with the AVAHI_LOOKUP_USE_WIDE_AREA flag set via D-Bus (either by calling
> +the RecordBrowserNew method directly or by creating hostname/address/service
> +resolvers/browsers that create those browsers internally themselves).
> +
> +```
> +$ gdbus call --system --dest org.freedesktop.Avahi --object-path / --method
> org.freedesktop.Avahi.Server.ResolveHostName -- -1 -1 yo.local -1 1
> +Error: GDBus.Error:org.freedesktop.DBus.Error.NoReply: Message recipient
> disconnected from message bus without replying
> +```
> +```
> +dbus-protocol.c: interface=org.freedesktop.Avahi.Server, path=/,
> member=ResolveHostName
> +avahi-daemon: wide-area.c:725: avahi_wide_area_scan_cache: Assertion `e'
> failed.
> +==307948==
> +==307948== Process terminating with default action of signal 6 (SIGABRT)
> +==307948== at 0x4B3630C: __pthread_kill_implementation (pthread_kill.c:44)
> +==307948== by 0x4ADF921: raise (raise.c:26)
> +==307948== by 0x4AC74AB: abort (abort.c:77)
> +==307948== by 0x4AC741F: __assert_fail_base.cold (assert.c:118)
> +==307948== by 0x48D8B85: avahi_wide_area_scan_cache (wide-area.c:725)
> +==307948== by 0x48C8953: lookup_scan_cache (browse.c:351)
> +==307948== by 0x48C8B1B: lookup_go (browse.c:386)
> +==307948== by 0x48C9148: defer_callback (browse.c:516)
> +==307948== by 0x48AEA0E: expiration_event (timeeventq.c:94)
> +==307948== by 0x489D3AE: timeout_callback (simple-watch.c:447)
> +==307948== by 0x489D787: avahi_simple_poll_dispatch (simple-watch.c:563)
> +==307948== by 0x489D91E: avahi_simple_poll_iterate (simple-watch.c:605)
> +==307948==
> +```
> +
> +wide-area has been disabled by default since
> +9c4214146738146e454f098264690e8e884c39bd (v0.9-rc2).
> +
> +https://github.com/avahi/avahi/security/advisories/GHSA-mhf3-865v-g5rc
> +
> +CVE: CVE-2025-68276
> +Upstream-Status: Backport
> [https://github.com/avahi/avahi/commit/2d48e42d44a183f26a4d12d1f5d41abb9b7c6355]
> +(cherry picked from commit 2d48e42d44a183f26a4d12d1f5d41abb9b7c6355)
> +Signed-off-by: Ankur Tyagi <[email protected]>
> +---
> + avahi-core/browse.c | 5 +++++
> + 1 file changed, 5 insertions(+)
> +
> +diff --git a/avahi-core/browse.c b/avahi-core/browse.c
> +index e8a915e..59d53cb 100644
> +--- a/avahi-core/browse.c
> ++++ b/avahi-core/browse.c
> +@@ -541,6 +541,11 @@ AvahiSRecordBrowser *avahi_s_record_browser_prepare(
> + AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_FLAGS_VALID(flags,
> AVAHI_LOOKUP_USE_WIDE_AREA|AVAHI_LOOKUP_USE_MULTICAST),
> AVAHI_ERR_INVALID_FLAGS);
> + AVAHI_CHECK_VALIDITY_RETURN_NULL(server, !(flags &
> AVAHI_LOOKUP_USE_WIDE_AREA) || !(flags & AVAHI_LOOKUP_USE_MULTICAST),
> AVAHI_ERR_INVALID_FLAGS);
> +
> ++ if ((flags & AVAHI_LOOKUP_USE_WIDE_AREA) &&
> !server->wide_area_lookup_engine) {
> ++ avahi_server_set_errno(server, AVAHI_ERR_NOT_SUPPORTED);
> ++ return NULL;
> ++ }
> ++
> + if (!(b = avahi_new(AvahiSRecordBrowser, 1))) {
> + avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
> + return NULL;
--
Yoann Congal
Smile ECS
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