From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D156436B90D for ; Sat, 15 Aug 2026 06:20:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786774845; cv=none; b=rxkH9Aqo3umgNvqHXluyXRwRCHM5ClgZlcBHz6zWKXKkrdr4Ck+vuL8A/1/VeLIyuJVcmU2+6tA7Nnu+dH/mFrkbBVJfvzRtS80NUyhgzOfoSjov8drQnCn3pY5LQpvRpfOFkepDi/p1Zh13d1xphaU2mbgsYh5PlC0P0W0Rzoo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786774845; c=relaxed/simple; bh=ZcX8eX+lAysbXLnQhGtjZELueaNM/m6dxz8UGjHXOmY=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Ox/sHCeYnEki4Uzyl47cEl0jNTgMOo+hszQ9zfHtsW5I9v6lH65Nj5RJ+zemGPbvvxeZabU2PgKz345hcavVozSzq2youR4uLXaHNab2X1MUQElvH+krEMBtiobBh63XQwbMKqjOtrcjohapogYeASvFL8MSGeF2pKZfGWE505c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=MLAJokor; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="MLAJokor" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2F3931F000E9; Sat, 15 Aug 2026 06:20:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786774844; bh=ClLAzb2RoM8VgacgiICi0Z8G3Zv1pcaAo2UlbOXHtcQ=; h=From:To:Cc:Subject:Date:Reply-To; b=MLAJokorHpac2YbVkRl3/y7XsyJTyCE/7GRHGzpGYSJLutI/B0Ph6ERHBxbqjRZg3 /H5XYX90O1x+i1C+PBPL9Xv9GLXsT/KJwEbV6Gf7+tTat3vLXXZSAuL1MJrkFytcb5 PBo0HM9mKiD7r4psGpOZf9M7SNSUG1aclMBdfpvk= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-72253: netfilter: nf_conntrack_sip: validate skb_dst() before accessing it Date: Sat, 15 Aug 2026 15:05:32 +0900 Message-ID: <2026081553-CVE-2026-72253-5b57@gregkh> X-Mailer: git-send-email 2.55.0 Reply-To: , Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2866; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=M+kN+aN27A1H7kmJrLt+a1vX47spJSmBGZfeoS4GABk=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkNDBePvvzi23N3VabbhLaTy5Zd3XFQZteTY9u/bnfhn 7dG0qxuckcsC4MgE4OsmCLLl208R/dXHFL0MrQ9DTOHlQlkCAMXpwBMJHURw4IT2b1Wazb9mTn5 UFmdZeHtH9d5pjkzzLOU5Aw0+bH+L0suw8KDp/3PzZDk3AkA X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: 8bit From: Greg Kroah-Hartman Description =========== In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_sip: validate skb_dst() before accessing it tc ingress and openvswitch do not guarantee routing information to be available. These subsystems use the conntrack helper infrastructure, and the SIP helper relies on the skb_dst() to be present if sip_external_media is set to 1 (which is disabled by default as a module parameter). This effectively disables the sip_external_media toggle for these subsystems without resulting in a crash. The Linux kernel CVE team has assigned CVE-2026-72253 to this issue. Affected and fixed versions =========================== Issue introduced in 4.3 with commit cae3a2627520c3795b54533c5328b77af3405dbe and fixed in 6.6.148 with commit e64a48c50a1ff565a98c6a98d82b5b942868e76e Issue introduced in 4.3 with commit cae3a2627520c3795b54533c5328b77af3405dbe and fixed in 6.12.101 with commit c199ed687c00841daf60e9d131976958583a8c09 Issue introduced in 4.3 with commit cae3a2627520c3795b54533c5328b77af3405dbe and fixed in 6.18.42 with commit 09755dc62b026076b1d47f83489eb0547c8135e0 Issue introduced in 4.3 with commit cae3a2627520c3795b54533c5328b77af3405dbe and fixed in 7.1.5 with commit b843a96252f672332837ea2ecb7c8db0acf68e20 Issue introduced in 4.3 with commit cae3a2627520c3795b54533c5328b77af3405dbe and fixed in 7.2-rc2 with commit e5e24a365a5e024efef63cc49abb345fbd4852c5 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2026-72253 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: net/netfilter/nf_conntrack_sip.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/e64a48c50a1ff565a98c6a98d82b5b942868e76e https://git.kernel.org/stable/c/c199ed687c00841daf60e9d131976958583a8c09 https://git.kernel.org/stable/c/09755dc62b026076b1d47f83489eb0547c8135e0 https://git.kernel.org/stable/c/b843a96252f672332837ea2ecb7c8db0acf68e20 https://git.kernel.org/stable/c/e5e24a365a5e024efef63cc49abb345fbd4852c5