Remove PROTOPT_CONN_REUSE from SMB handler flags to prevent connection pooling. Without this, a second SMB request to the same host reuses a connection authenticated for a different share.
Reference: https://curl.se/docs/CVE-2026-5773.html Signed-off-by: Jaipaul Cheernam <[email protected]> --- .../curl/curl/CVE-2026-5773.patch | 48 +++++++++++++++++++ meta/recipes-support/curl/curl_8.19.0.bb | 1 + 2 files changed, 49 insertions(+) create mode 100644 meta/recipes-support/curl/curl/CVE-2026-5773.patch diff --git a/meta/recipes-support/curl/curl/CVE-2026-5773.patch b/meta/recipes-support/curl/curl/CVE-2026-5773.patch new file mode 100644 index 0000000000..970e04b33f --- /dev/null +++ b/meta/recipes-support/curl/curl/CVE-2026-5773.patch @@ -0,0 +1,48 @@ +From 74a169575d6412dc0ff532acdf94de35a6c2a571 Mon Sep 17 00:00:00 2001 +From: Daniel Stenberg <[email protected]> +Date: Sun, 5 Apr 2026 18:23:35 +0200 +Subject: [PATCH] protocol: disable connection reuse for SMB(S) + +Connections should only be reused when using the same "share" (and +perhaps some additional conditions), but instead of fixing this flaw, +this change completely disables connection reuse for SMB. This protocol +is about to get dropped soon anyway. + +Reported-by: Osama Hamad +Closes #21238 +Signed-off-by: Daniel Stenberg <[email protected]> + +CVE: CVE-2026-5773 +Upstream-Status: Backport [https://github.com/curl/curl/commit/74a169575d6412dc0ff532acdf94de35a6c2a571] + +Note: The upstream fix targets lib/protocol.c which was introduced in +curl 8.20.0. In 8.19.0 the SMB handler flags are still in lib/smb.c, +so this patch removes PROTOPT_CONN_REUSE there instead. The effect is +identical: SMB connections are no longer pooled for reuse. + +Signed-off-by: Jaipaul Cheernam <[email protected]> +--- + lib/smb.c | 4 ++-- + 1 file changed, 2 insertions(+), 2 deletions(-) + +diff --git a/lib/smb.c b/lib/smb.c +index ccd4f3f69d..2a9f08388f 100644 +--- a/lib/smb.c ++++ b/lib/smb.c +@@ -1242,7 +1242,7 @@ + #endif + CURLPROTO_SMB, /* protocol */ + CURLPROTO_SMB, /* family */ +- PROTOPT_CONN_REUSE, /* flags */ ++ PROTOPT_NONE, /* flags */ + PORT_SMB, /* defport */ + }; + +@@ -1259,7 +1259,7 @@ + #endif + CURLPROTO_SMBS, /* protocol */ + CURLPROTO_SMB, /* family */ +- PROTOPT_SSL | PROTOPT_CONN_REUSE, /* flags */ ++ PROTOPT_SSL, /* flags */ + PORT_SMBS, /* defport */ + }; diff --git a/meta/recipes-support/curl/curl_8.19.0.bb b/meta/recipes-support/curl/curl_8.19.0.bb index d58b774011..3326f478b5 100644 --- a/meta/recipes-support/curl/curl_8.19.0.bb +++ b/meta/recipes-support/curl/curl_8.19.0.bb @@ -15,6 +15,7 @@ SRC_URI = " \ file://disable-tests \ file://no-test-timeout.patch \ file://CVE-2026-6276.patch \ + file://CVE-2026-5773.patch \ file://mbedtls.patch \ " -- 2.34.1
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