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 0CFD7528435 for ; Thu, 17 Sep 2026 16:34:48 +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=1789662889; cv=none; b=Ae795aUdSImJe5rEBHC5c4Y6nv13zFTguV7Ie5BezdamfitbWVgEWYcsPhWJQmxWpuVfezQWqe59gSx4VNOlR81JKgO8gvZx8Cey4Zdx2MJKiLB+ttjhF9yWjURM3+ncn+hf/umXUZsPDZ6N9gfPlMOgbPlF6uUMBTcm3MQHn8Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789662889; c=relaxed/simple; bh=nOr5Vq9Jcf9ggw3V5j5nWD7LpjZVDcG8DQixazKZAmg=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=gQXoDmOl7fFBZ2mq2YAa91L31g3OOpiVpIn8ZAa2TeLXaQBa1ulwmB2hOSPLpoDXoU+M0uu+QphfDjAyASPNWvoMQHWiHXDCVhGGSmrkN8EuOI7giiKddmNb/0Ec+vF0fTyn9E0HTDGtwzHRdANT/lmfIhkOCZDx0z6qkKuj9Iw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=UPMZMdC1; 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="UPMZMdC1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5659A1F000FF; Thu, 17 Sep 2026 16:34:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789662887; bh=UJX/+A8GEJX2/QFpZIQNs7+Iq03RM8FaMk/3dPQtN2E=; h=From:To:Cc:Subject:Date:Reply-To; b=UPMZMdC1k0Xta1vLwYF2colZy4XAfnLrRRe8SZwHSISGNEt9+95alaHfaJVRGsbXd yrE744zJkU+bZAphM0ghuvP0cW4h6/KyONAHPnSIVIHRdKki6jDu0NA+e7rZejtRId d1Zy2KMfikmcaPnuENq3o+tHlYB2VH14fPWUg/yk= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-93055: UDF symlink pathComponent header OOB read Date: Thu, 17 Sep 2026 17:15:34 +0100 Message-ID: <2026091735-CVE-2026-93055-7aaa@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=3421; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=Z33Hf5H/kJpi1/3L81AUWS+fTwUtJTgpMAr3ckodyIQ=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlrBPYHyS85OsH3moaZ6KyrbxyWfvZo+jkxQVmiRKxMX vXx9f23OmJZGASZGGTFFFm+bOM5ur/ikKKXoe1pmDmsTCBDGLg4BWAiudsZ5hcsdQsuCDGZmzdh +rqiaXV/vQ69m8mwoL2b+8A/eQ++yft3Ht1TteEq74dWKQA= 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: UDF symlink pathComponent header OOB read udf_symlink_filler() can enter udf_pc_to_char() with a partial pathComponent header. Validate that enough input remains for a complete pathComponent header before accessing it. Reject malformed symlink data that would otherwise make udf_pc_to_char() perform an out-of-bounds read. The Linux kernel CVE team has assigned CVE-2026-93055 to this issue. Affected and fixed versions =========================== Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 5.10.270 with commit d9f49c8b55debf1512f912077b6c759cc8b6d2e0 Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 5.15.221 with commit 48b2a74317e15f93983c74a5a07245bc94a00d39 Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.1.188 with commit f44f5f795f1a56249821a05183347ea025855e31 Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.6.157 with commit 57371e743398e0d485f0f7beede1ade41f812324 Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.12.110 with commit ee264227b656218bc1b257d8e4f83467f5f17723 Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 6.18.52 with commit 8da8fd3df9fc14cf79ca3a3978d27ba067985111 Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 7.2.6 with commit b21cb958292ee1e02eb305ff9de09f2f7edd551a Issue introduced in 2.6.12 with commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and fixed in 7.3-rc1 with commit d23eb7380d1594cda31a5dc8487dd2a5c8def8c7 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-2026-93055 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: fs/udf/symlink.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/d9f49c8b55debf1512f912077b6c759cc8b6d2e0 https://git.kernel.org/stable/c/48b2a74317e15f93983c74a5a07245bc94a00d39 https://git.kernel.org/stable/c/f44f5f795f1a56249821a05183347ea025855e31 https://git.kernel.org/stable/c/57371e743398e0d485f0f7beede1ade41f812324 https://git.kernel.org/stable/c/ee264227b656218bc1b257d8e4f83467f5f17723 https://git.kernel.org/stable/c/8da8fd3df9fc14cf79ca3a3978d27ba067985111 https://git.kernel.org/stable/c/b21cb958292ee1e02eb305ff9de09f2f7edd551a https://git.kernel.org/stable/c/d23eb7380d1594cda31a5dc8487dd2a5c8def8c7