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 98DE535A933 for ; Sat, 15 Aug 2026 06:14:07 +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=1786774448; cv=none; b=By8FaEXOe/2draDs7a90IwrkeN/lFSMn8HrGC5e1KDhmbWtP2MyIpa1ahqogv2xl7JR3hq8bWsWPshNL2LbOaF/Lk6ZN//urIMpPil55Sc7AN0JfdJZBbnnL5nvL6K1TqAqjewrCwp3in8xCmEXgAdgjNO8EMUvFPc9xLJ+vTK8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786774448; c=relaxed/simple; bh=QhwenJQd3VKjEXb5sJnAL8ybVS0SSgx5cqSxQOyjLJ4=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=KP97GEV+OEieFwI9UWyXjB/dqi1QW5z2Rf0Y7LjqbSlDEgfdXnhYl7myRMYzo3k5epS1dDHbhZQq1llMmpJdcdkh2E83VmIXFUyyxBKN4bxJlrZxiJ3oUxU1TC+47aoxeElsnxsajE+plVHNm5v/56UxAhrZxubpjt4AMgdfC70= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=XBxQKup4; 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="XBxQKup4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F323B1F000E9; Sat, 15 Aug 2026 06:14:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786774447; bh=uEmNQPt7pSjqwfstbg30znKc4115Y4NDkOPEE4GRTDk=; h=From:To:Cc:Subject:Date:Reply-To; b=XBxQKup4uhKGGmhFMu1O4zdrrsZr5YeiIotYR3m5m8kKezQspgoaaUz+gCZ2rPkKa 7Jfa81UqaUOkMBHMOhzwEH8UDmKpeD/rL95OCc8TbN3/tQ9CGuEl8lOb4p9amEQxA9 XE5xkZXPi1BoyS+31FeChRYV6mROKchNyJBJxQ8E= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-72156: fpga: microchip-spi: fix zero header_size OOB read in mpf_ops_parse_header() Date: Sat, 15 Aug 2026 15:03:55 +0900 Message-ID: <2026081535-CVE-2026-72156-0591@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=3167; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=Guv+2rfaecdJl4PF/ZEQJ9pb5LFnEgJumq/Dz6kXgzc=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkNDPvr9adIlEmpiV13zrjux2HNv/b3trPRR5Vudxzik ducfGhnRywLgyATg6yYIsuXbTxH91ccUvQytD0NM4eVCWQIAxenAEykYT3DfN/cjgw+jxtT119N CHV4eT32G3/kG4b5nvMvKihH7wl0FtHa5dlllvzjMF8mAA== 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: fpga: microchip-spi: fix zero header_size OOB read in mpf_ops_parse_header() mpf_ops_parse_header() reads header_size from the bitstream at MPF_HEADER_SIZE_OFFSET (24). When header_size is zero, the expression *(buf + header_size - 1) reads one byte before the buffer start. Since initial_header_size is set to 71 in mpf_ops, the fpga-mgr core guarantees the buffer is large enough to reach MPF_HEADER_SIZE_OFFSET. The only real gap is the zero header_size case, which cannot be resolved by providing a larger buffer, so return -EINVAL. The Linux kernel CVE team has assigned CVE-2026-72156 to this issue. Affected and fixed versions =========================== Issue introduced in 6.0 with commit 5f8d4a9008307e0bf210906948953386935d361c and fixed in 6.1.178 with commit e45ec24d8e986d79a8e07f49a816c414ad283622 Issue introduced in 6.0 with commit 5f8d4a9008307e0bf210906948953386935d361c and fixed in 6.6.145 with commit 0d3766fecd9b2db39a18b48021c15c522997ec25 Issue introduced in 6.0 with commit 5f8d4a9008307e0bf210906948953386935d361c and fixed in 6.12.97 with commit a1baee24df72ec8fd1d6925c1d5162ffff4ee3bf Issue introduced in 6.0 with commit 5f8d4a9008307e0bf210906948953386935d361c and fixed in 6.18.40 with commit c9ef79e34bc1eac4fd59051e5c7b96a74e59d46f Issue introduced in 6.0 with commit 5f8d4a9008307e0bf210906948953386935d361c and fixed in 7.1.5 with commit 3da8eaf5469eda2353b72038d644fabddb848ce1 Issue introduced in 6.0 with commit 5f8d4a9008307e0bf210906948953386935d361c and fixed in 7.2-rc1 with commit 43a1974da6bc7ce8f4d1dc1d03d56997428c29c3 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-2026-72156 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/fpga/microchip-spi.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/e45ec24d8e986d79a8e07f49a816c414ad283622 https://git.kernel.org/stable/c/0d3766fecd9b2db39a18b48021c15c522997ec25 https://git.kernel.org/stable/c/a1baee24df72ec8fd1d6925c1d5162ffff4ee3bf https://git.kernel.org/stable/c/c9ef79e34bc1eac4fd59051e5c7b96a74e59d46f https://git.kernel.org/stable/c/3da8eaf5469eda2353b72038d644fabddb848ce1 https://git.kernel.org/stable/c/43a1974da6bc7ce8f4d1dc1d03d56997428c29c3