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 57AFE420897 for ; Thu, 3 Sep 2026 08:27:09 +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=1788424030; cv=none; b=JEhd9q8WAmaIsmbRY1Ml7yHX5u9zx0dgpTZv18JeIfo3dmFUB1Z8uOI8kvk9MXCg/ui0cXIXTOKqQ9gzm8bppx36IDQ25WprgpFN9u3GUGcFPJoPvC6BCr9ZBKtoC9jn8OYzIwCOQqDe0Vgq+cKbyDrKIibEwb8enoxGXUm8oyc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788424030; c=relaxed/simple; bh=74KuvT3ZLQ52MYNcM80XWyHorcC4ni9gi4QWc1k5/B8=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=d0hrW9HBodCCrxzA/Z1hybbhJGZEOFBx8D09Baer9eGALMc3TxEcraha09wtW/YpAgV0wXPmX4YftQTgwn6BjrwNeFwfPm1zQTpRrBWhEPTg0Bzdtzqd5MAENjym8Sw57SAXD/QxUvmj8Jq/uTKy/uGZC7+2h4tMOFob6yMKTdU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=yoolU13Y; 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="yoolU13Y" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5CF4E1F000E9; Thu, 3 Sep 2026 08:27:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788424028; bh=+zgi7Ktf913z3iFGUqeZOLmwjU50OhPDgmF5GueDuKM=; h=From:To:Cc:Subject:Date:Reply-To; b=yoolU13Y5P642eoVWmo76CKnpg78xJTZbTRi8eLudrhpUzszRAJ+faY+9Axacprlo K3Mo3c+9CvO9eeL51TO6Qkc/eFjvQakO8dEdjuGLhgX2xMGGuUOtV4gpxzOdQyZ5KX ij/TyULiwm+07GBLv0iD5yeJXzg/VG3tTQFriRVA= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-80755: selinux: reject a permission value exceeding the class permission count Date: Thu, 3 Sep 2026 10:26:52 +0200 Message-ID: <2026090340-CVE-2026-80755-07ed@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=2884; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=xMCd1V4iI+a5aeZm9wJqsrodZyUuagCh2fpL9k+7aU4=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkz9R2usN06UB0QkG+4RyVGiIsj2+HjpN3XDndnRtnbH 9z+h0WmI5aFQZCJQVZMkeXLNp6j+ysOKXoZ2p6GmcPKBDKEgYtTACbid4BhwcVX4c8D2D73PE6z +lF9Sv6l0LvEHoZ5WiIHTLzMKjVWHaw0PfKhZFWaqigbAA== 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: selinux: reject a permission value exceeding the class permission count perm_read() bounds a permission value by SEL_VEC_MAX but never by the nprim of the owning class or common, which is taken verbatim from the policy image. security_get_permissions() then writes perms[value - 1] into an nprim-sized kcalloc() array, so a class declaring fewer permissions than its largest permission value drives an out-of-bounds heap write. The top-level symbol tables are validated this way; the nested per-class permission table is not. Reject a permission whose value exceeds nprim, which is already set when perm_read() runs. Well-formed policies are unaffected. [PM: tweak comment for line length] The Linux kernel CVE team has assigned CVE-2026-80755 to this issue. Affected and fixed versions =========================== Issue introduced in 2.6.23 with commit 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 and fixed in 6.12.108 with commit 6c2ab7c4549f4f2305848df834e784651dbf1676 Issue introduced in 2.6.23 with commit 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 and fixed in 6.18.49 with commit dfc59a062c386d3d4415ecdab781065a645f33cc Issue introduced in 2.6.23 with commit 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 and fixed in 7.1.13 with commit a7f3d4f22d920dc3c7d75f02ece0f7bf2c58437e Issue introduced in 2.6.23 with commit 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 and fixed in 7.2 with commit d14b5d0e97fccd27974fedc03b903408872907fd 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-2026-80755 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/selinux/ss/policydb.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/6c2ab7c4549f4f2305848df834e784651dbf1676 https://git.kernel.org/stable/c/dfc59a062c386d3d4415ecdab781065a645f33cc https://git.kernel.org/stable/c/a7f3d4f22d920dc3c7d75f02ece0f7bf2c58437e https://git.kernel.org/stable/c/d14b5d0e97fccd27974fedc03b903408872907fd