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 380A13BCD36 for ; Mon, 10 Aug 2026 12:04:08 +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=1786363450; cv=none; b=lZscOgqFoAYUbe91Tab7N3aHp2YKKhzQKM0jlwPClTBn5OevT7FYtkAckQz07CrHlZuGR4yWcxXpGBVypd48k0P4g0dr5oLvnFD1QvvAqsmv1hLxPKhjP7RD9xUxB5bExY+yDVVvDAsygVVIqkMx8ij0YAfBmdnmZb8ERXhawIg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786363450; c=relaxed/simple; bh=3uQ6ReSCg6nAh5J4jyqAl46SFAKER510e8nhPZR9CXs=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=pfvcSY0Cerj7fClkrjhFWKczueSrzKJeuEWO6ke6mP0K1W8CK43Tc4jPoz4R4kUIeyBEaH8ziucWnGaJZF/+6FqVh5WGwO1JXLlnjDEcKYomftJrsnyaZOfYI7uU6SiiZBEfxG0onU55aNbQi8tkzdzlCqF7mVNNfyY1YehMh4Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=j62sHDfW; 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="j62sHDfW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 706A21F000E9; Mon, 10 Aug 2026 12:04:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786363448; bh=6dLb/JRVy8zBSG+zmQnREFTxeP3pMCjwA2umxUAPW88=; h=From:To:Cc:Subject:Date:Reply-To; b=j62sHDfWyGKYzKsIlNZuFZ0UpFvsoJ2Wi2DdQ0IzInK4jPWGO7p9Q29RDPyvXFHEF iGe/hBf86qqCYdJwfEkk79VJD9a8xKS8HBekPpNCfPi4wLWSpw2jY5g1phO4OalPs2 x3SalSaNYwh9rLccAaQyEwpnxLYzLRz1kbqeMDqY= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-68168: afs: Fix afs_edit_dir_remove() to get, not find, block 0 Date: Mon, 10 Aug 2026 13:58:05 +0200 Message-ID: <2026081005-CVE-2026-68168-38e8@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=2319; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=clfed8VTyepOJ9gl+bcQtroNFHza+8ASDgdvqgxi9es=; b=owGbwMvMwCRo6H6F97bub03G02pJDFmVeyYekeIy0NX49XfJ7DXXykNlJryQ3sSTmN87+92MC t/sn2sudcSyMAgyMciKKbJ82cZzdH/FIUUvQ9vTMHNYmUCGMHBxCsBEnroyzOGMPR6/55Bu//P+ TebXT1SueCHHo8OwYN/pbYFtM20Om3O0SDi9k1b8FCQsCgA= 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: afs: Fix afs_edit_dir_remove() to get, not find, block 0 Fix afs_edit_dir_remove() to use afs_dir_get_block() to get block 0 rather than afs_dir_find_block() as the latter caches the found block in the afs_dir_iter and may[*] switch out the page it's on if another afs_dir_find_block() is done. This parallels what afs_edit_dir_add() does. [*] There's more than one block per page. The Linux kernel CVE team has assigned CVE-2026-68168 to this issue. Affected and fixed versions =========================== Issue introduced in 6.14 with commit a5b5beebcf96d5e8a2fc79856c2ac1e93f82478e and fixed in 6.18.42 with commit f2b293359924117736218701ebd8b40618d73e6f Issue introduced in 6.14 with commit a5b5beebcf96d5e8a2fc79856c2ac1e93f82478e and fixed in 7.1.6 with commit bfdfc7782ada6f3a4df7182889b66039f8e4131c Issue introduced in 6.14 with commit a5b5beebcf96d5e8a2fc79856c2ac1e93f82478e and fixed in 7.2-rc5 with commit 62d9853aa4ce6e9797b6949804891be14b219752 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-2026-68168 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/afs/dir_edit.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/f2b293359924117736218701ebd8b40618d73e6f https://git.kernel.org/stable/c/bfdfc7782ada6f3a4df7182889b66039f8e4131c https://git.kernel.org/stable/c/62d9853aa4ce6e9797b6949804891be14b219752