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 A62E63C1D7C for ; Fri, 28 Aug 2026 06:55:56 +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=1787900157; cv=none; b=lQGTTqQwNINSGxe2U/vugh/+4UakHlae2mSMY50k94ze5lWPZ69xou4AHGqUilLeMRldOynmncJhmtAHx/ZRzCcigUGUNvYzupH9HGOh/2ZTDeSdbJo/jhyNZMrPvxLhvoF8i1Up+/Hi9w021cjUSl/v51yOm6ZKOoP2F0bWBq8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787900157; c=relaxed/simple; bh=zWyRS5qI3Ev6baCFS0U48phL5kH1dqdYRoObhip5bA8=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=okrPVedkp5il6PU7pdNg+TlPvYRs0I8AvdGmhvIur7M9C90+XUZEaiWTzC47d3oq+BBJtOAizitx2PT0fetRpLeqNNP/3adeVptZyJJ97lS29K0VQwaEvrmwnmq18MTjb5btqhfVr46BzqkLPbd9thVf0tCVCRgch6xwXmef7qc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=vCWSOxxs; 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="vCWSOxxs" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0EF311F000E9; Fri, 28 Aug 2026 06:55:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1787900156; bh=Prqw8Az6oj+R4Jt7WixkH98C1NJBbYg+iZygworuZzk=; h=From:To:Cc:Subject:Date:Reply-To; b=vCWSOxxsH0Nl7Qufwl1XhpRCUM+m/z4PrtOc2WQAb/hl5WL9gOyXzcPz4MRIelGO5 pCi87wXk9kTpwCeKIJ+DsI1luF6tkDPgvC2DyY3Jtpq1Bi5k87G7n57cb3+Zqa8J9e Q6j9s6ueWrPuKK3vL0YbTjWeHUaZbP9OI48jFdMg= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-80707: can: j1939: transport: j1939_session_fresh_new(): initialize receive buffer Date: Fri, 28 Aug 2026 08:53:30 +0200 Message-ID: <2026082807-CVE-2026-80707-cf56@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=3482; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=gIW7MT618KCcK5SYDaUC5Higas+bKBeLo8NtCbwaVrk=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkTDYKvyS5TN/Q439uVIuzrdPVE6BcZ/db/Og9OKwvPF i83E7/YEcvCIMjEICumyPJlG8/R/RWHFL0MbU/DzGFlAhnCwMUpABPRZ2GYK1V4zdpbl8HXUX/2 dKMtnb/Yz5rfZJhnkfdl1o/M9RfS/AtFDq2aUl15/KoKAA== 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: can: j1939: transport: j1939_session_fresh_new(): initialize receive buffer Zero the allocated buffer in j1939_session_fresh_new() to ensure it contains no residual data. While there is a potential performance impact if users allocate maximum sized ETP buffers, most real-world use cases are not noticeably affected since the maximum known buffer size is typically around 65K. [mkl: add Message-ID] The Linux kernel CVE team has assigned CVE-2026-80707 to this issue. Affected and fixed versions =========================== Issue introduced in 5.4 with commit 9d71dd0c70099914fcd063135da3c580865e924c and fixed in 5.10.265 with commit 348818277a3646d5b9fa60c9d20c00dc4bc86832 Issue introduced in 5.4 with commit 9d71dd0c70099914fcd063135da3c580865e924c and fixed in 5.15.216 with commit f3e120a34b336079479fa10f706f0636eaa6e751 Issue introduced in 5.4 with commit 9d71dd0c70099914fcd063135da3c580865e924c and fixed in 6.1.183 with commit bbfa49d1e287de44994955b44d19281be3195b44 Issue introduced in 5.4 with commit 9d71dd0c70099914fcd063135da3c580865e924c and fixed in 6.6.151 with commit 194d67e92197eb820f4c2c6605d9721333b3eba0 Issue introduced in 5.4 with commit 9d71dd0c70099914fcd063135da3c580865e924c and fixed in 6.12.103 with commit 038bad8e16c2e28acf31f0b527a816fb23a57269 Issue introduced in 5.4 with commit 9d71dd0c70099914fcd063135da3c580865e924c and fixed in 6.18.44 with commit 8604a3b81b9d0ceaf04fee5f52e701f623a179f9 Issue introduced in 5.4 with commit 9d71dd0c70099914fcd063135da3c580865e924c and fixed in 7.1.8 with commit d5b3613c7d69d8dcb4dd6704f1f463198ce9f6cf Issue introduced in 5.4 with commit 9d71dd0c70099914fcd063135da3c580865e924c and fixed in 7.2 with commit eb96c58907922546e415e545fe9a14ea63b02719 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-2026-80707 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/can/j1939/transport.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/348818277a3646d5b9fa60c9d20c00dc4bc86832 https://git.kernel.org/stable/c/f3e120a34b336079479fa10f706f0636eaa6e751 https://git.kernel.org/stable/c/bbfa49d1e287de44994955b44d19281be3195b44 https://git.kernel.org/stable/c/194d67e92197eb820f4c2c6605d9721333b3eba0 https://git.kernel.org/stable/c/038bad8e16c2e28acf31f0b527a816fb23a57269 https://git.kernel.org/stable/c/8604a3b81b9d0ceaf04fee5f52e701f623a179f9 https://git.kernel.org/stable/c/d5b3613c7d69d8dcb4dd6704f1f463198ce9f6cf https://git.kernel.org/stable/c/eb96c58907922546e415e545fe9a14ea63b02719