From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 7B1001A314C for ; Wed, 26 Feb 2025 01:58:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740535108; cv=none; b=lxFRnIZ/RaFyJaUvBuNBXownJbOcJOC6ReZ0aPXiHO+a1Qb8NX/l5gNMGx0f3vzh9pvs3xjoEiHVIz/Yi5L5OHhnWeHDL44hIPcIpx9cVcZTk4H9HVU0SgcE2+ZDhCL7BHjEhZOvZe5kYU/atg3f54hwO00AN2sJ9m9xnoIr1To= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740535108; c=relaxed/simple; bh=tSB/+ouuf4SMuNAW5VYN+LbFOwfQa0x+TCicQdD2PrU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=BMr5jrNJiGr9SgX3VCKNd4onv2wkc6hEVr9X0L9btTyAm5r/VHneFsETsxbcuFgieJ9J2tI5d5cPEzEefyxdV3SzhZBdbURkuQa+SE33ThPwxeplI5MEn0ORsexIzpVptvaZm6Al6wgc4/7jfEEkdd+wosXkcs9b0lOJTcHBH44= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=jOF+rdi0; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="jOF+rdi0" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E9AB7C4CEDD; Wed, 26 Feb 2025 01:58:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1740535108; bh=tSB/+ouuf4SMuNAW5VYN+LbFOwfQa0x+TCicQdD2PrU=; h=From:To:Cc:Subject:Date:Reply-to:From; b=jOF+rdi0xiRGc1QXvRr9BVeEhAopknOA76cSc2DlbvoWr+y4LaeSKFjcXigRgus1y er97tzMu6jt05AaDfzAuPHAne97WinMU2hBv9gC/EvxMHp2ZwuPYz1xpUvlak1kf6/ G/iFYJXe9JXe9VMtt3pOvJNyujWITqVkjKyXNEL8= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2022-49078: lz4: fix LZ4_decompress_safe_partial read out of bound Date: Wed, 26 Feb 2025 02:54:43 +0100 Message-ID: <2025022656-CVE-2022-49078-df00@gregkh> X-Mailer: git-send-email 2.48.1 Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Reply-to: , X-Developer-Signature: v=1; a=openpgp-sha256; l=3006; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=tSB/+ouuf4SMuNAW5VYN+LbFOwfQa0x+TCicQdD2PrU=; b=owGbwMvMwCRo6H6F97bub03G02pJDOn7SkyufD+dqn1qavIUlWOzFl6dzrfG4LhxqYXm5V+f+ RtYqq4mdMSyMAgyMciKKbJ82cZzdH/FIUUvQ9vTMHNYmUCGMHBxCsBESpIY5ilN1Vv7tWGWS9C/ T4aqkuzfa9gWvmdYMP2a5/HnHJzhHw63myxaWHGIN3j6NgA= X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: 8bit Description =========== In the Linux kernel, the following vulnerability has been resolved: lz4: fix LZ4_decompress_safe_partial read out of bound When partialDecoding, it is EOF if we've either filled the output buffer or can't proceed with reading an offset for following match. In some extreme corner cases when compressed data is suitably corrupted, UAF will occur. As reported by KASAN [1], LZ4_decompress_safe_partial may lead to read out of bound problem during decoding. lz4 upstream has fixed it [2] and this issue has been disscussed here [3] before. current decompression routine was ported from lz4 v1.8.3, bumping lib/lz4 to v1.9.+ is certainly a huge work to be done later, so, we'd better fix it first. [1] https://lore.kernel.org/all/000000000000830d1205cf7f0477@google.com/ [2] https://github.com/lz4/lz4/commit/c5d6f8a8be3927c0bec91bcc58667a6cfad244ad# [3] https://lore.kernel.org/all/CC666AE8-4CA4-4951-B6FB-A2EFDE3AC03B@fb.com/ The Linux kernel CVE team has assigned CVE-2022-49078 to this issue. Affected and fixed versions =========================== Fixed in 5.4.189 with commit 73953dfa9d50e5c9fe98ee13fd1d3427aa12a0a3 Fixed in 5.10.111 with commit 6adc01a7aa37445dafe8846faa0610a86029b253 Fixed in 5.15.34 with commit 9fb8bc6cfc58773ce95414e11c9ccc8fc6ac4927 Fixed in 5.16.20 with commit e64dbe97c05c769525cbca099ddbd22485630235 Fixed in 5.17.3 with commit 467d5e200ab4486b744fe1776154a43d1aa22d4b Fixed in 5.18 with commit eafc0a02391b7b36617b36c97c4b5d6832cf5e24 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-2022-49078 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: lib/lz4/lz4_decompress.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/73953dfa9d50e5c9fe98ee13fd1d3427aa12a0a3 https://git.kernel.org/stable/c/6adc01a7aa37445dafe8846faa0610a86029b253 https://git.kernel.org/stable/c/9fb8bc6cfc58773ce95414e11c9ccc8fc6ac4927 https://git.kernel.org/stable/c/e64dbe97c05c769525cbca099ddbd22485630235 https://git.kernel.org/stable/c/467d5e200ab4486b744fe1776154a43d1aa22d4b https://git.kernel.org/stable/c/eafc0a02391b7b36617b36c97c4b5d6832cf5e24