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gnutls: fix CVE-2026-42010

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Backport patch to fix CVE-2026-42010.

References:
  https://nvd.nist.gov/vuln/detail/CVE-2026-42010

Upstream fix:
  cb1833afd9

Tested with ptest

(From OE-Core rev: 2b1ed475e021c0eb13014a170911e96b1b0aed28)

Signed-off-by: Jakub Szczudlo <jakub.szczudlo@nokia.com>
Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Jakub Szczudlo (Nokia)
2026-08-26 08:06:30 +00:00
committed by Richard Purdie
parent 5f2d0ad996
commit 815238195b
2 changed files with 42 additions and 0 deletions
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41
meta/recipes-support/gnutls/gnutls/CVE-2026-42010.patch Normal file
View File

@@ -0,0 +1,41 @@
From cb1833afd9b6309563211b1c0a7c291f52ca98d5 Mon Sep 17 00:00:00 2001
From: Alexander Sosedkin <asosedkin@redhat.com>
Date: Tue, 21 Apr 2026 19:26:10 +0200
Subject: [PATCH] lib/auth/rsa_psk: fix binary PSK identity lookup
A server looking up PSK username with a NUL-character in it
was wrongfully matching username truncated at a NUL-character.
Fix the check to compare up to the full username length.
CVE: CVE-2026-42010
Upstream-Status: Backport [https://gitlab.com/gnutls/gnutls/-/commit/cb1833afd9b6309563211b1c0a7c291f52ca98d5]
Reported-by: Joshua Rogers of AISLE Research Team <joshua@joshua.hu>
Fixes: #1850
Fixes: CVE-2026-42010
Fixes: GNUTLS-SA-2026-04-29-4
CVSS: 7.1 High CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Signed-off-by: Alexander Sosedkin <asosedkin@redhat.com>
Signed-off-by: Peter Marko <peter.marko@siemens.com>
Signed-off-by: Jakub Szczudlo <jakub.szczudlo@nokia.com>
---
lib/auth/rsa_psk.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/lib/auth/rsa_psk.c b/lib/auth/rsa_psk.c
index cc92b4aa96..27caf18769 100644
--- a/lib/auth/rsa_psk.c
+++ b/lib/auth/rsa_psk.c
@@ -321,8 +321,7 @@ static int _gnutls_proc_rsa_psk_client_kx(gnutls_session_t session,
* filled in if the key is not found.
*/
ret = _gnutls_psk_pwd_find_entry(session, info->username,
- strlen(info->username), &pwd_psk,
- NULL);
+ info->username_len, &pwd_psk, NULL);
if (ret < 0)
return gnutls_assert_val(ret);
--
GitLab

1
meta/recipes-support/gnutls/gnutls_3.8.4.bb
View File

@@ -46,6 +46,7 @@ SRC_URI = "https://www.gnupg.org/ftp/gcrypt/gnutls/v${SHRT_VER}/gnutls-${PV}.tar
file://CVE-2026-42009_p1.patch \
file://CVE-2026-42009_p2.patch \
file://CVE-2026-3833.patch \
file://CVE-2026-42010.patch \
"
SRC_URI[sha256sum] = "2bea4e154794f3f00180fa2a5c51fe8b005ac7a31cd58bd44cdfa7f36ebc3a9b"