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 02CF330D3E0 for ; Thu, 24 Sep 2026 16:12:09 +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=1790266331; cv=none; b=NFiqk1eVYWdepcQe9Bh1eiwZQteTtlABAn/1W/XNRnOXTLeoZ9gcspkwUrefF6MxvQKiBfTUr7Y/ogHcjs0GRMe1noICc0FT4JQSPv8Nrg46CqPo8Kz+A6UFOC8Mj6z3HMFrmNqcuCoUzGkFbk4OcZ2phU2TNBw2F6Oxng49Doc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790266331; c=relaxed/simple; bh=HKj/gFaUFO5UxFOg47TzTXFu2dS8QX0PLWfJ56FFyT0=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=QR/4vINu3efjvOHTfKoRZJTKez7yVvrqGqpcploD/6j4Umk4pEU7Ctz6G8Udpni7FDkUGiPALCsPDsNMiBg9X9eu+ykFh0j5NBIJRrrFtyrOSH2rT0Dkq0tDktVXLlCsTN57L1KDk1n3hkqWTXn2YNCqhB941ZN0F+AKxlq8s+Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Z2FIycJ7; 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="Z2FIycJ7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0F2661F00893; Thu, 24 Sep 2026 16:12:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790266329; bh=3T8s0nU/J/7NtG4umMkVlehyjVFuzxihgzbSjJPAr2A=; h=From:To:Cc:Subject:Date:Reply-To; b=Z2FIycJ70TozeFke04V3iaKiHPvDpTSq0xIEvWASYWcwtd3/6+UMJbsj/dAXwsVLb dQk3ZBcNZYm4bRkCK8FVRPwBdjQgKS+3RAL7m02Oua3bEWIIDm5ZsYG7ebOiMIPTfv kgl51KUZxzAgr2xBlqZfAqsDF4Vzb8b/ClFZy0c8= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-97417: netfilter: nf_conntrack: use get_unaligned_be32() in tcp_sack() Date: Thu, 24 Sep 2026 18:03:17 +0200 Message-ID: <2026092427-CVE-2026-97417-e678@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=2170; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=Hth+MVgTaGFv3Rjmbq+sKcaX7Upg7mBrYtV0y2mSq0Y=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlbPSffDJnANfWKh3blpo9yckF3/5zX3L0pLXvqTSW1d 0cC/CcmdsSyMAgyMciKKbJ82cZzdH/FIUUvQ9vTMHNYmUCGMHBxCsBESvwYFnSZNRuq21vxHFeY k6R9b+rstjpnLYYFexYLCXJVsy8Kfya5cdHRoytqwiJrAQ== 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: use get_unaligned_be32() in tcp_sack() The timestamp-only fast path dereferences the option stream as *(__be32 *)ptr, which assumes 4-byte alignment that the TCP option stream does not guarantee. Use get_unaligned_be32() instead, which reads the value safely and already returns host byte order, so the htonl() on the comparison constant can be dropped. This matches the existing get_unaligned_be32() use later in the same function. The Linux kernel CVE team has assigned CVE-2026-97417 to this issue. Affected and fixed versions =========================== Fixed in 6.12.111 with commit 7ecfa46a536578a7ed335ddf31a854127268c27c Fixed in 6.18.53 with commit 4abc1af7ac209c066f4e5dd75cdd56876e5829a9 Fixed in 7.2 with commit d3bf9eae486490832bd08fd62ab0ac601f346bd4 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-2026-97417 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_proto_tcp.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/7ecfa46a536578a7ed335ddf31a854127268c27c https://git.kernel.org/stable/c/4abc1af7ac209c066f4e5dd75cdd56876e5829a9 https://git.kernel.org/stable/c/d3bf9eae486490832bd08fd62ab0ac601f346bd4