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 175DA3B27DF for ; Thu, 17 Sep 2026 16:35:02 +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=1789662904; cv=none; b=R7Bi2oFFHm2JtOF1o3Gelq+bJGYDmDdQ3VTdWnkqPvYVU/Wr8W9ue8ER73R9iDxnUBeuJfX2sF4khZk/avD2MjTBlEIR0InH7SYr/pzNdVk85Xugfthmt27dmZbunCN0jVuRLNpKgWwqb1HIxqgsliT6cYhSCTPK0su+Gd1NLJc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789662904; c=relaxed/simple; bh=0bdbQXeRxB3M3cdYWzYI2W3hJSTkj2vYv7HruHuUoL8=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=gkJEs/lgKABTRmtLbk8wt3RQ1lp6hz7SS0J0l8iQdc04b/vCb043LebbbnvPa88uqUhEj1JcougmvAPi+/a0qXg4Uax43La/tgGhtlNgjhNOUa570Ly8ZXWbPjQ40kpwWAOfk0y0ajv/JgoaqU/1E6Zt309ARqrIXt6bnEvNdxs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=2YTwH+Lj; 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="2YTwH+Lj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 246331F000FF; Thu, 17 Sep 2026 16:35:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789662902; bh=TRfc6OZEAfp/Le/Dq9M+pP2GKKT4uo/q8q8qB2ZlBTA=; h=From:To:Cc:Subject:Date:Reply-To; b=2YTwH+LjlulMCRUIu7jms5fiip3srIR8Jvn06Oo0YxufsIfcDInQAz6qu1Y3BWxSV m520dve7k4NAiwysL1CpVl18ndQ5uHXT2OnAq1MudtTUgsF5YvlYG+8GOdQUuuy6ix SP06eQsPiz3HmTUdWKWJCA6srQDYTSlW9feb8Pps= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-92522: ACPI: processor: validate MADT IOAPIC entry bounds Date: Thu, 17 Sep 2026 17:15:12 +0100 Message-ID: <2026091731-CVE-2026-92522-effb@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=3689; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=1iYApt9rsFt97M12/iFsTpDAdPwB+5ttEfVOPAyerYU=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlrBHbLLXJV32Nu7HL38Uzv6anvr/pfPZD6QuDk1IYld mLM6dUtHbEsDIJMDLJiiixftvEc3V9xSNHL0PY0zBxWJpAhDFycAjARgyiG+SlMkl8izE+oGSkw tF+NMZRJVJ7/mmGerYuK4Z+ffxsWH5GN3dcW4FEevfAEAA== 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: ACPI: processor: validate MADT IOAPIC entry bounds The IOAPIC hotplug lookup parses both MADT and _MAT records directly. The MADT walk previously used a subtable's declared length to advance the cursor after only locating a generic header. The _MAT path likewise passed a generic header to the IOAPIC helper. Validate that a current record has a complete generic header, that its declared length is contained in the available record range, and that a typed IOAPIC record contains the full fixed IOAPIC body before reading its fields. Use the same relation for both MADT and _MAT provider paths. The Linux kernel CVE team has assigned CVE-2026-92522 to this issue. Affected and fixed versions =========================== Issue introduced in 4.0 with commit ecf5636dcd59cd5508641f995cc4c2bafedbb995 and fixed in 5.10.270 with commit 5601bd81bc290a724ed47797d22c16cba4d7ed9f Issue introduced in 4.0 with commit ecf5636dcd59cd5508641f995cc4c2bafedbb995 and fixed in 5.15.221 with commit ff82e3374e9103d046b2a82f4315d9a422ff097d Issue introduced in 4.0 with commit ecf5636dcd59cd5508641f995cc4c2bafedbb995 and fixed in 6.1.188 with commit 2a5520065e76000f8c979d3d7b3d861ccaaecf1e Issue introduced in 4.0 with commit ecf5636dcd59cd5508641f995cc4c2bafedbb995 and fixed in 6.6.157 with commit 8e67b58c04990817ac2dbf8ae03353be6a358cd4 Issue introduced in 4.0 with commit ecf5636dcd59cd5508641f995cc4c2bafedbb995 and fixed in 6.12.110 with commit 74d84320f8e37955eb286a7777843d554e6e75b2 Issue introduced in 4.0 with commit ecf5636dcd59cd5508641f995cc4c2bafedbb995 and fixed in 6.18.52 with commit 4d8ecaa332c163f2b44aa5027bf061950b71b5f3 Issue introduced in 4.0 with commit ecf5636dcd59cd5508641f995cc4c2bafedbb995 and fixed in 7.2.6 with commit 355bee5f11acb116cd256588631b4028ca562646 Issue introduced in 4.0 with commit ecf5636dcd59cd5508641f995cc4c2bafedbb995 and fixed in 7.3-rc1 with commit 2c50ffdc73f3a70d745d249f509fc290754121e6 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-2026-92522 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: drivers/acpi/processor_core.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/5601bd81bc290a724ed47797d22c16cba4d7ed9f https://git.kernel.org/stable/c/ff82e3374e9103d046b2a82f4315d9a422ff097d https://git.kernel.org/stable/c/2a5520065e76000f8c979d3d7b3d861ccaaecf1e https://git.kernel.org/stable/c/8e67b58c04990817ac2dbf8ae03353be6a358cd4 https://git.kernel.org/stable/c/74d84320f8e37955eb286a7777843d554e6e75b2 https://git.kernel.org/stable/c/4d8ecaa332c163f2b44aa5027bf061950b71b5f3 https://git.kernel.org/stable/c/355bee5f11acb116cd256588631b4028ca562646 https://git.kernel.org/stable/c/2c50ffdc73f3a70d745d249f509fc290754121e6