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 64EE04908C0 for ; Fri, 25 Sep 2026 10:24:49 +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=1790331890; cv=none; b=n0lkjJWKTtNnVMX1CJpWO1nkva89wN0tURd5XiLOuRTN08TjX8nIyV0BqXhBeCWmQOwclAfu2m7/PA3VNdPQpfHmhlkV+8+PTdZUymyC6gFYkmyGiHGxqFDFcT8uqAQ2PVLOYCG6UGb2MKqtWTNfaTYjpe+A2u+l0RxbLx5Fv3g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790331890; c=relaxed/simple; bh=fZ6lXrqFevL1/EL1Eq8TsHH/XNiLiH+lAjDdvGMiSZ0=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=S/yf07vXL71ePTZMRL8OLKVVrdcDVWejPrH6MEyGNish/Sg9HUPDfQ32v7Ro+ve4RJiSEYK6kT0O6OCwlCzQdVn+RjDwRi3WLMnfI9SU/aRqSHeVnoThsxbp2ArqA1BltWVFgHjWTMzW0qslR1v4zez6cxqf2baZRohjPD4anhg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=JWmlN+tw; 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="JWmlN+tw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AE4721F000FF; Fri, 25 Sep 2026 10:24:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790331889; bh=PbmjKL9Knq2dGs+fU7rUWDnLEzTiY7gVz6AYThpRRJ8=; h=From:To:Cc:Subject:Date:Reply-To; b=JWmlN+twW1MsCNGTz1VOfdV3U6sq+VW8hIDPnK1rA/SihoYlz9bqrN1NOzuueC1XY 4wqUorqu4ZoCAPAZDvgq8flZBwalP9JqP+DNGgB+/pICP8UbFo+1X69e2KD10+OgZK vlD+YwbixZZsmY1YygGzDG5L28OLkWwGtsPH8vxM= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-97567: mptcp: prevent race between disconnect() and rtx Date: Fri, 25 Sep 2026 12:22:27 +0200 Message-ID: <2026092553-CVE-2026-97567-e127@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=2119; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=Gq8ea4j1HQRdAq+8XQlQ/VLnveg2kl4ARtYuy5vpOVM=; b=owGbwMvMwCRo6H6F97bub03G02pJDFnbvJ0CH4XwK7HWvry0sJLplKE8042j09wuzvR1T+9Qb 5p/uORsRywLgyATg6yYIsuXbTxH91ccUvQytD0NM4eVCWQIAxenAExkvwvDPLObL6WjDpj8yFii cDPvuNNEp98pJxkW7HvvvrCkRrJxAWfC/NBipc9tHpOZAA== 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: mptcp: prevent race between disconnect() and rtx Sashiko noted that the two event can race, leading to inconsistent status. Prevent the race using the synchronous timer stop operation. The Linux kernel CVE team has assigned CVE-2026-97567 to this issue. Affected and fixed versions =========================== Issue introduced in 5.17 with commit b29fcfb54cd70caca5b11c80d8d238854938884a and fixed in 6.18.53 with commit 374da2b9be1280695ce41f108334a8f16e3e54be Issue introduced in 5.17 with commit b29fcfb54cd70caca5b11c80d8d238854938884a and fixed in 7.2.7 with commit 69a7b2a912672159dda7dcf325d27752d448dfdf Issue introduced in 5.17 with commit b29fcfb54cd70caca5b11c80d8d238854938884a and fixed in 7.3-rc3 with commit 85c580b0d8590520ae00a15c29e9fb9c99427a3e 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-2026-97567 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/mptcp/protocol.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/374da2b9be1280695ce41f108334a8f16e3e54be https://git.kernel.org/stable/c/69a7b2a912672159dda7dcf325d27752d448dfdf https://git.kernel.org/stable/c/85c580b0d8590520ae00a15c29e9fb9c99427a3e