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 CDDBB346E68 for ; Wed, 27 May 2026 12:20:14 +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=1779884416; cv=none; b=Dby/orFdFZZLjGaLxHZ8CBzAyBHQZTW5zEH66CQesteq+IXOFFKy0unIRaaRvu4GX+RuK9N+qu7IQMvJeTHk0plJ2VW2Y2q8dOD0kQ9Zp/eLYN2nBdqECV5pG8mLgH3yyUGeik6oIdTQZjN5tnABnKyiitw//+HbU8AK5gnRIEY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779884416; c=relaxed/simple; bh=TEe3wrlUlmJYNGjR+nafmb9s4dIK7FNXC3ebFT1yZLU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=KyUuT9QjewyBvh3TA0D0vxv1atwg2RIRWYTi60oowyxSHRiLP9lTuf9KMQc0+dWqUhtzI31GgC5TLTmyVDGHAUrnmlLcZ16GO3e55h50wBgIFHRKc0hlGwDWhUUP8D84sJiyTAddSLk4e+jRgItAigCPT0+Uvfn6LopJxXEqBpA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=1ywlyI4u; 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="1ywlyI4u" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 14F481F000E9; Wed, 27 May 2026 12:20:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1779884414; bh=KEC4jIErim+wKbD48SteeOoNurq+idFuAf3OiRZMslI=; h=From:To:Cc:Subject:Date:Reply-To; b=1ywlyI4uVcyRhmZQzdnsQ/1KiVx9bfiu2vdpHtX+0+xjhJ5QEIaRaAO302VnSVmu6 AHZkJH3dQQCmJFCzMucTgfKWa/fa/CJISR+M63MPGcrRLBl1M+a/FvZurlItz0pQ+z uKHXq2M65song6qrbBqaQ8cZ2ocuna8T663aPqoc= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-45848: apparmor: fix NULL sock in aa_sock_file_perm Date: Wed, 27 May 2026 14:18:10 +0200 Message-ID: <2026052707-CVE-2026-45848-b001@gregkh> X-Mailer: git-send-email 2.54.0 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=3535; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=kEY2W+3osGyG4mQFdP0xwn+wWeim3tERd13NMNVvqzs=; b=owGbwMvMwCRo6H6F97bub03G02pJDFliD/4zPdWf9Djjgljk79mu3dPOfmz4NuHo6swnre4dU 3yP5J240xHDwiDIxCArpsjyZRvP0f0VhxS9DG1Pw8xhZQIZwsDFKQATEWhnmHG6cBKz1K3H7VFv M7pkNkmK2756xrBg54IoqbVHk00Vbm66rCkvxvnw/+seAA== 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: apparmor: fix NULL sock in aa_sock_file_perm Deal with the potential that sock and sock-sk can be NULL during socket setup or teardown. This could lead to an oops. The fix for NULL pointer dereference in __unix_needs_revalidation shows this is at least possible for af_unix sockets. While the fix for af_unix sockets applies for newer mediation this is still the fall back path for older af_unix mediation and other sockets, so ensure it is covered. The Linux kernel CVE team has assigned CVE-2026-45848 to this issue. Affected and fixed versions =========================== Issue introduced in 4.17 with commit 56974a6fcfef69ee0825bd66ed13e92070ac5224 and fixed in 5.10.252 with commit 68538ec34fcb4194c7961dc4eca6f5537fec8067 Issue introduced in 4.17 with commit 56974a6fcfef69ee0825bd66ed13e92070ac5224 and fixed in 5.15.202 with commit 5121b7283f1c46e4c06b88b1dda7b064429d77de Issue introduced in 4.17 with commit 56974a6fcfef69ee0825bd66ed13e92070ac5224 and fixed in 6.1.165 with commit c11b7c3280d000376e27ebfed17ec7046699eab4 Issue introduced in 4.17 with commit 56974a6fcfef69ee0825bd66ed13e92070ac5224 and fixed in 6.6.128 with commit 0dc19bca22606f7a61d5988408f74e3ae0ef3486 Issue introduced in 4.17 with commit 56974a6fcfef69ee0825bd66ed13e92070ac5224 and fixed in 6.12.75 with commit 3852eb9a0392eb435c03dcb47d581bcfe6a9a95b Issue introduced in 4.17 with commit 56974a6fcfef69ee0825bd66ed13e92070ac5224 and fixed in 6.18.14 with commit ccb66a3c6c8f51b3ed1bc003b70bb9ff99e8d835 Issue introduced in 4.17 with commit 56974a6fcfef69ee0825bd66ed13e92070ac5224 and fixed in 6.19.4 with commit 8a0ededbfcff74598f82f1d4b8ef9db28878b317 Issue introduced in 4.17 with commit 56974a6fcfef69ee0825bd66ed13e92070ac5224 and fixed in 7.0 with commit 00b67657535dfea56e84d11492f5c0f61d0af297 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-2026-45848 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: security/apparmor/net.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/68538ec34fcb4194c7961dc4eca6f5537fec8067 https://git.kernel.org/stable/c/5121b7283f1c46e4c06b88b1dda7b064429d77de https://git.kernel.org/stable/c/c11b7c3280d000376e27ebfed17ec7046699eab4 https://git.kernel.org/stable/c/0dc19bca22606f7a61d5988408f74e3ae0ef3486 https://git.kernel.org/stable/c/3852eb9a0392eb435c03dcb47d581bcfe6a9a95b https://git.kernel.org/stable/c/ccb66a3c6c8f51b3ed1bc003b70bb9ff99e8d835 https://git.kernel.org/stable/c/8a0ededbfcff74598f82f1d4b8ef9db28878b317 https://git.kernel.org/stable/c/00b67657535dfea56e84d11492f5c0f61d0af297