From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 63FA6215F70 for ; Wed, 26 Feb 2025 02:13:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740536009; cv=none; b=ZIxvqpbWMBbuxEf5qXxV1HF0UP3CymAV8rNb6OGt/t+eZzM1Xd0/yRqc1UJ28+iYZayltjIn8ykxVIcekM3J9WGOJCEVm2OZYntOE91on91ZQUKNY858PPJUghrNU5hK3JFRmu/hi48upe82101kMzH1GSdXcKGvXGWs2mSaSfw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740536009; c=relaxed/simple; bh=FJaMentJjV7t1SbkkKHl0Bp37U2JRAxeBgduFfmwXaQ=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=rkcaj2I6BSbOMz1imdF0/8rQGV7IvJW9142F482mVg/FqpWSvfIRwBBZ6kRdZocAACIQscyBeXbENdCY61jBAgkUKSmVaD6I9iprUdKBCUp5Fh2XkgNSNQ/7FoDz6/x1mTi64Yxfc/p2InFzXBidj2BGwMya50xKxEjX3od0uTQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=UiwWTzxh; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="UiwWTzxh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 38FD0C4CEDD; Wed, 26 Feb 2025 02:13:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1740536009; bh=FJaMentJjV7t1SbkkKHl0Bp37U2JRAxeBgduFfmwXaQ=; h=From:To:Cc:Subject:Date:Reply-to:From; b=UiwWTzxhJFvGKu44mpKzprnZQ+4Vs7LuKhgl1ToZvmVbVyD0M4Dalm8QdNp1xDamN mDonD4ihS3pYQA6PyAQqLP8QdDgyF4UqwkjAloXD/Beizpybv/y7ImiXkpljZYW9JQ kN47opmsFdImeoxuKy8UvLB/B+fTIlxm8px2AjUY= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2022-49366: ksmbd: fix reference count leak in smb_check_perm_dacl() Date: Wed, 26 Feb 2025 03:10:40 +0100 Message-ID: <2025022645-CVE-2022-49366-d901@gregkh> X-Mailer: git-send-email 2.48.1 Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Reply-to: , X-Developer-Signature: v=1; a=openpgp-sha256; l=2613; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=FJaMentJjV7t1SbkkKHl0Bp37U2JRAxeBgduFfmwXaQ=; b=owGbwMvMwCRo6H6F97bub03G02pJDOn7yl9m+uaVlrmLKKe7qu15tMVV155PxyF1zv+as0UHm eqeBL/tiGVhEGRikBVTZPmyjefo/opDil6Gtqdh5rAygQxh4OIUgIl8q2eYZ1N90UrWOSFKJcna KrJs2vYk7RNXGWazeJpsfLlEffrkaS3bT8VU3ubvk28BAA== X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: 8bit Description =========== In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix reference count leak in smb_check_perm_dacl() The issue happens in a specific path in smb_check_perm_dacl(). When "id" and "uid" have the same value, the function simply jumps out of the loop without decrementing the reference count of the object "posix_acls", which is increased by get_acl() earlier. This may result in memory leaks. Fix it by decreasing the reference count of "posix_acls" before jumping to label "check_access_bits". The Linux kernel CVE team has assigned CVE-2022-49366 to this issue. Affected and fixed versions =========================== Issue introduced in 5.15 with commit 777cad1604d68ed4379ec899d1f7d2f6a29f01f0 and fixed in 5.15.47 with commit cf824b95c12a1abacadbc2d069931963221a3414 Issue introduced in 5.15 with commit 777cad1604d68ed4379ec899d1f7d2f6a29f01f0 and fixed in 5.17.15 with commit 248d71b440aef829f5cc5f6545ca113ef5062900 Issue introduced in 5.15 with commit 777cad1604d68ed4379ec899d1f7d2f6a29f01f0 and fixed in 5.18.4 with commit 9758a6653c27867d810de02b4e5697163dda9883 Issue introduced in 5.15 with commit 777cad1604d68ed4379ec899d1f7d2f6a29f01f0 and fixed in 5.19 with commit d21a580dafc69aa04f46e6099616146a536b0724 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-2022-49366 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/ksmbd/smbacl.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/cf824b95c12a1abacadbc2d069931963221a3414 https://git.kernel.org/stable/c/248d71b440aef829f5cc5f6545ca113ef5062900 https://git.kernel.org/stable/c/9758a6653c27867d810de02b4e5697163dda9883 https://git.kernel.org/stable/c/d21a580dafc69aa04f46e6099616146a536b0724