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 94C8B48F822 for ; Fri, 25 Sep 2026 10:27:16 +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=1790332037; cv=none; b=YMcQ7o9xfI+iRMbb1E7VmDCAZtApbVMaEU8s7MPEaMVkSXikthaCJwhfiQhgoG+If14K8wG0fmqj0h+VgJ2pHy241qn4jI1tmQgWgb9J/FQKbmf28qJUCSyHuMFyPjW6KHilZpdyA9+0Vaqyktx6HKQYEOgoQV8eLrdwYqtDR6U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790332037; c=relaxed/simple; bh=1U3D1Q4zJaMB5gDau6NV49TaoOjsTn5rGlCouGnospI=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=L5gWTGRhb117Izr5zeI7MjeJMtPAmJX9VNHF+f37pvQ87z1DE6A+CKk4/wmuziAtpEfjQmGv9qA/9OgGy8/QT5EyzEoRD74mxdzaaV3sPnxUkX+XmxR1l2CPONQQS7SwDynKQ9gcmfmyJ6nHKkWyYvDWqAPcgHzvC9TsPChU3Xw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=tyspeAP8; 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="tyspeAP8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DBCCF1F000FF; Fri, 25 Sep 2026 10:27:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790332036; bh=tMAhR66Sl1wd3r3+fZBpmbXxStPN+c6ES1jix98RpQo=; h=From:To:Cc:Subject:Date:Reply-To; b=tyspeAP8//AnnVUYKJKouIv89g3K7DR0IBwG4hU0ipBbX5/DsHY3AIPCCUWFj9rTV PZiSAI0vVv4vhhOYYQoV/K1F/CI3FNJ17IUKFmywKiyuGVUSl9N1Rr3PLj0tpPTIeZ pIKsjHjUAT67OTRGlILjfvnMWrc3oZ8nc12r3P5o= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-97575: media: v4l2-ctrls: validate AV1 tile counts Date: Fri, 25 Sep 2026 12:22:35 +0200 Message-ID: <2026092555-CVE-2026-97575-428b@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=2828; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=w/3LuX+P46ISH+FUIXev9DwaGi99+LGtkPZD6dpK2hU=; b=owGbwMvMwCRo6H6F97bub03G02pJDFnbvJ33iPj93/j3U06bkVmYcdTFYzFSlz0ec+lPWrfV1 DVr2nLvjlgWBkEmBlkxRZYv23iO7q84pOhlaHsaZg4rE8gQBi5OAZhIWyPD/PzfXQEBTyU/m81w mWX3SzeJJfQoH8P8hBdf84U3p7w5eXhV7evFv4tKjI/7AAA= 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: media: v4l2-ctrls: validate AV1 tile counts The stateless AV1 decoders use tile_info.tile_cols and tile_rows as loop bounds and as indices into the mi_*_starts[] and *_in_sbs_minus_1[] arrays, as the divisor for context_update_tile_id, and their product bounds the per-tile descriptor buffers, but std_validate_compound() does not bound these u8 fields. Reject a V4L2_CTRL_TYPE_AV1_FRAME whose tile_cols or tile_rows exceeds V4L2_AV1_MAX_TILE_COLS / _ROWS, or whose product exceeds V4L2_AV1_MAX_TILE_COUNT. A zero tile count is left to the consuming driver so the zero-initialised control that existing userspace submits is still accepted. The Linux kernel CVE team has assigned CVE-2026-97575 to this issue. Affected and fixed versions =========================== Issue introduced in 6.5 with commit 9de30f579980b498606a9c2440b73ae3b670771b and fixed in 6.12.111 with commit 85df9fc79b07f1cc7c953f930ae7e675d0c1e820 Issue introduced in 6.5 with commit 9de30f579980b498606a9c2440b73ae3b670771b and fixed in 6.18.53 with commit c8891da0186fe4c04bccbbd7d84b01a3c941ac7a Issue introduced in 6.5 with commit 9de30f579980b498606a9c2440b73ae3b670771b and fixed in 7.2.7 with commit c4c88b5ba85685043d171e0e9c9d00a8cf6a89e8 Issue introduced in 6.5 with commit 9de30f579980b498606a9c2440b73ae3b670771b and fixed in 7.3-rc3 with commit 439058ced617fbb3febc017b9e93bb7387f309e0 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-2026-97575 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/media/v4l2-core/v4l2-ctrls-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/85df9fc79b07f1cc7c953f930ae7e675d0c1e820 https://git.kernel.org/stable/c/c8891da0186fe4c04bccbbd7d84b01a3c941ac7a https://git.kernel.org/stable/c/c4c88b5ba85685043d171e0e9c9d00a8cf6a89e8 https://git.kernel.org/stable/c/439058ced617fbb3febc017b9e93bb7387f309e0