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 E742D58FD3D for ; Fri, 11 Sep 2026 20:04:46 +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=1789157101; cv=none; b=GsS4CBAdJCC6ymZKXDGWTFTDV4u2CrjL3QXhVALr3E+JOTKzj3W6UmO6oO/vovQd2Nxp00wZpHmy1wP9BErbSVrX4aiIQfanmUjy3y72OevPRSNiAEbWSLHNtAYv7fV/CY6O6cvRMvSj42xqbMyfsspGUr1AxJoue8J+ZqEDbew= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789157101; c=relaxed/simple; bh=GydHRXv6yzKX37wgRR3msi7qWomm7hUfjoMpIdtXBKU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=QgPEN2wCI60qcO4UHtGU4LQSBDFBpkuKiwvJdHTCF3fOSuimzBi+dvr/FDGJv0uUwb+tRZSuXFW9QoZUdvKwVU9HA9ReIw7TYnPLvsmkO5U0hJPk5j0n5mAD5gngEj/55y+GLDJgQQKbQdlkHW6OALJfJ/38Oey4t8VU+6fnxYM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=nONPWTe+; 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="nONPWTe+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 069FD1F00899; Fri, 11 Sep 2026 20:04:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789157084; bh=Al+Z+G0kmVTWv3JwuqOhqtdwUdujKD1PPmcrZAHNOhI=; h=From:To:Cc:Subject:Date:Reply-To; b=nONPWTe+6TIlOzPVPYg7aBbOJ8KwIsjmol/nUAygwwVWRle9F/OgCzOS6QlTOuW+b LDMSMzAATmTZFvQvkJGTEICv9WbwFHi2Ws0sxNvwlT8jpDXv/Yt/f0/DTPRHpxyzst m1uPXaQ3ZPqjym0M2yoV39NSrjT2OggVbiD2SPRU= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-89730: fpga: altera-cvp: Avoid out-of-bounds read in trailing byte write Date: Fri, 11 Sep 2026 21:46:59 +0200 Message-ID: <2026091102-CVE-2026-89730-cb5f@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=2611; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=+Gp9BQu33SAVb4sBsJYpaxYplTQV0LzYfjf75qTNL/I=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlLIruM/cTTnRaEdDyZE+GnnfEq5aqf59MqHu+QkCi23 ra61y87YlkYBJkYZMUUWb5s4zm6v+KQopeh7WmYOaxMIEMYuDgFYCJ6/AzzPdUNggSlKzbwZKio ZmvPYeJ3yf7IsGDRjqXqqf8+KXvWvj1T7fqUiaPX+AsA 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: altera-cvp: Avoid out-of-bounds read in trailing byte write The trailing byte path in altera_cvp_send_block() dereferences a u32 pointer even when only 1-3 bytes remain in the input buffer. If the buffer ends at a page or scatterlist boundary, this can read past the valid image data and fault. Copy the remaining bytes into a zero-initialized u32 before writing the final word so only valid bytes are read from the input buffer. The Linux kernel CVE team has assigned CVE-2026-89730 to this issue. Affected and fixed versions =========================== Issue introduced in 4.14 with commit 34d1dc17ce978ae76e676d401b48fe9d004aa948 and fixed in 6.12.109 with commit b138bc665e21d4422382ab43aebdf0a2b7bb9cb3 Issue introduced in 4.14 with commit 34d1dc17ce978ae76e676d401b48fe9d004aa948 and fixed in 6.18.50 with commit 827ec385458adeeda651de2b6f3537e386b1a8d9 Issue introduced in 4.14 with commit 34d1dc17ce978ae76e676d401b48fe9d004aa948 and fixed in 7.2.4 with commit 4dc1051939e499c838229af035464a5fc7671198 Issue introduced in 4.14 with commit 34d1dc17ce978ae76e676d401b48fe9d004aa948 and fixed in 7.3-rc1 with commit 9da70a43b5fea60d758137f7f0ccfe19356cb5bb 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-2026-89730 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/altera-cvp.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/b138bc665e21d4422382ab43aebdf0a2b7bb9cb3 https://git.kernel.org/stable/c/827ec385458adeeda651de2b6f3537e386b1a8d9 https://git.kernel.org/stable/c/4dc1051939e499c838229af035464a5fc7671198 https://git.kernel.org/stable/c/9da70a43b5fea60d758137f7f0ccfe19356cb5bb