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 81BF33F0771 for ; Fri, 8 May 2026 14:27:15 +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=1778250435; cv=none; b=asq3XS/zNgz3tTJIz0TTrxaKGj8AzEkObH06mWB2gQdp4IdlyMUEXNhX+6TT4LQhp5WR/24ixZmzTOJtd7cDqRLM2Rzc8ZXSY0I1RIi5Qa5ZSHcBjse8JXIZl5Vb9kS381odbUDjF5jauwTl7r7ZoMlOeq3hyAtWilygaCL+t+U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778250435; c=relaxed/simple; bh=sCoXn0lkMfDzDRVYnR+JcmB47agU5wE3/u7kIMNUs/o=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=hfKBl2CITSDHzhTJWDMkvKcjPoXxJKAaPeNHXv8badJ3NhnjFFi5jJ9tOJjQCMunCxsaLc8RFS9b7hrK1qDrN5oN9t2MqkzSRGLnDHm7zWwDi8nEBIjzXrV7N+ve/4AeyRkNm6WtsJa0DjkkpeDsu3rkMzeyzRFvXGENaDw4iBU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=X9uU4S7e; 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="X9uU4S7e" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 13CE1C2BCB0; Fri, 8 May 2026 14:27:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778250435; bh=sCoXn0lkMfDzDRVYnR+JcmB47agU5wE3/u7kIMNUs/o=; h=From:To:Cc:Subject:Date:Reply-To:From; b=X9uU4S7encnPmGAwU6hmC0zcwnHgT9ElPi7LWbvBcnPC9tmqajoDKTvFuNB2SWdM5 QXDEl8XvQ0DdePpkfCDo9W5J6EOX1CUofYj+mVTb/cslqoFdeyNJdiGZjHyD6S8Dkf g25EndWgiBxTVD1OgIMHIx7YodrasRG67EKBCoDY= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-43474: fs: init flags_valid before calling vfs_fileattr_get Date: Fri, 8 May 2026 16:23:23 +0200 Message-ID: <2026050806-CVE-2026-43474-36a6@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=2335; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=UTLSKK4HY3s0PZ6g3dxDPbKLdebTWCzS1fHaW0M+nTw=; b=owGbwMvMwCRo6H6F97bub03G02pJDJl/P/ZpJc0JTXl8+aag8/HUtk1/K5cZV3jy1LqoL1D9a aTz6NiCjlgWBkEmBlkxRZYv23iO7q84pOhlaHsaZg4rE8gQBi5OAZhIz2+GBeuzVu2bxxEptueK Wnr70QfTJPgrpzLMM2mxszLJ2ynp/HWOaOZu9YT9u9gXAgA= 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: fs: init flags_valid before calling vfs_fileattr_get syzbot reported a uninit-value bug in [1]. Similar to the "*get" context where the kernel's internal file_kattr structure is initialized before calling vfs_fileattr_get(), we should use the same mechanism when using fa. [1] BUG: KMSAN: uninit-value in fuse_fileattr_get+0xeb4/0x1450 fs/fuse/ioctl.c:517 fuse_fileattr_get+0xeb4/0x1450 fs/fuse/ioctl.c:517 vfs_fileattr_get fs/file_attr.c:94 [inline] __do_sys_file_getattr fs/file_attr.c:416 [inline] Local variable fa.i created at: __do_sys_file_getattr fs/file_attr.c:380 [inline] __se_sys_file_getattr+0x8c/0xbd0 fs/file_attr.c:372 The Linux kernel CVE team has assigned CVE-2026-43474 to this issue. Affected and fixed versions =========================== Fixed in 6.18.19 with commit 379e19e820dd1c6145426b97467728b3b89c0b42 Fixed in 6.19.9 with commit b8c182b2c8c44c6016b11d8af61715ad7ef958a1 Fixed in 7.0 with commit cb184dd19154fc486fa3d9e02afe70a97e54e055 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-2026-43474 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/file_attr.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/379e19e820dd1c6145426b97467728b3b89c0b42 https://git.kernel.org/stable/c/b8c182b2c8c44c6016b11d8af61715ad7ef958a1 https://git.kernel.org/stable/c/cb184dd19154fc486fa3d9e02afe70a97e54e055