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 62824535BB for ; Tue, 27 Feb 2024 06:54:30 +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=1709016872; cv=none; b=NMLOoOIcgqB0mtOkZnkr7rKddVjl/ZGfKN6J5qaGIWGSwJhPZCxzeBN700uiSXXEZj6HONDr5FpglJ4W64ifhZDlttbk5SEi8ywz9QgH1Lrfxyn2v22/LCClc1C+Px4FRvsskDYR2g/K0XjQtDWtE4t0vD5I5OgjH3jb6Md6lA8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709016872; c=relaxed/simple; bh=r3n+M1807e9xk2aE2xH4/IkPfoslWAu/46qgWmlrKSk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=FFzPb2cS1xkS66amdnsWymRLL1JnB41F7GmpTCJJ3iPGqSjDfDMHCnU9DVpT7ceQzG/0gXzOhTnyG5+yP/Zx1+99KqBQLt5LPYbap9frpUaviW2g9CKaVc77/L6Bt8scm/ObtbmN5gBHMksy8Sj7LSTQQcl1kAsLPrM/lcXpBws= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=xvatj6+8; 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="xvatj6+8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7D7A0C43390; Tue, 27 Feb 2024 06:54:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1709016870; bh=r3n+M1807e9xk2aE2xH4/IkPfoslWAu/46qgWmlrKSk=; h=From:To:Cc:Subject:Date:Reply-to:From; b=xvatj6+88y4wptVcw4Jiybzc9vS0jo/OLQWwpDG9GFwlGdvNr/oF4SBN6+wlgRtih i8tuVnR2ONbAMXFI3PKRe4o96HWdpOPawsIkuBgpOqQ0+2XlU8SGl+7PzH5aNLAYbb QnVK8uR1M5uQSG7GYLlul6PzyCCwFQh3RuQpiSfw= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2021-46913: netfilter: nftables: clone set element expression template Date: Tue, 27 Feb 2024 07:54:09 +0100 Message-ID: <2024022708-CVE-2021-46913-eeef@gregkh> X-Mailer: git-send-email 2.44.0 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=3247; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=r3n+M1807e9xk2aE2xH4/IkPfoslWAu/46qgWmlrKSk=; b=owGbwMvMwCRo6H6F97bub03G02pJDKl32wVXhySI116Uagz5m1/CxDVhT/7ND4brNPwcl3IWv J6e/CymI5aFQZCJQVZMkeXLNp6j+ysOKXoZ2p6GmcPKBDKEgYtTACbCLc8wVyT4UNydLB7D9Z8m XONd9GS90MV4GYYFqxadnlpzY/OlWY3X36c0M8TtrT87AwA= 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: netfilter: nftables: clone set element expression template memcpy() breaks when using connlimit in set elements. Use nft_expr_clone() to initialize the connlimit expression list, otherwise connlimit garbage collector crashes when walking on the list head copy. [ 493.064656] Workqueue: events_power_efficient nft_rhash_gc [nf_tables] [ 493.064685] RIP: 0010:find_or_evict+0x5a/0x90 [nf_conncount] [ 493.064694] Code: 2b 43 40 83 f8 01 77 0d 48 c7 c0 f5 ff ff ff 44 39 63 3c 75 df 83 6d 18 01 48 8b 43 08 48 89 de 48 8b 13 48 8b 3d ee 2f 00 00 <48> 89 42 08 48 89 10 48 b8 00 01 00 00 00 00 ad de 48 89 03 48 83 [ 493.064699] RSP: 0018:ffffc90000417dc0 EFLAGS: 00010297 [ 493.064704] RAX: 0000000000000000 RBX: ffff888134f38410 RCX: 0000000000000000 [ 493.064708] RDX: 0000000000000000 RSI: ffff888134f38410 RDI: ffff888100060cc0 [ 493.064711] RBP: ffff88812ce594a8 R08: ffff888134f38438 R09: 00000000ebb9025c [ 493.064714] R10: ffffffff8219f838 R11: 0000000000000017 R12: 0000000000000001 [ 493.064718] R13: ffffffff82146740 R14: ffff888134f38410 R15: 0000000000000000 [ 493.064721] FS: 0000000000000000(0000) GS:ffff88840e440000(0000) knlGS:0000000000000000 [ 493.064725] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 493.064729] CR2: 0000000000000008 CR3: 00000001330aa002 CR4: 00000000001706e0 [ 493.064733] Call Trace: [ 493.064737] nf_conncount_gc_list+0x8f/0x150 [nf_conncount] [ 493.064746] nft_rhash_gc+0x106/0x390 [nf_tables] The Linux kernel CVE team has assigned CVE-2021-46913 to this issue. Affected and fixed versions =========================== Issue introduced in 5.7 with commit 409444522976 and fixed in 5.10.64 with commit e51ff3ffc316 Issue introduced in 5.7 with commit 409444522976 and fixed in 5.11.16 with commit 47d8de3c2265 Issue introduced in 5.7 with commit 409444522976 and fixed in 5.12 with commit 4d8f9065830e Please see https://www.kernel.org or 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-2021-46913 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: net/netfilter/nf_tables_api.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/e51ff3ffc316377cca21de8b80404eed0c37b3c3 https://git.kernel.org/stable/c/47d8de3c226574a3ddb8b87d0c152028d1bafef4 https://git.kernel.org/stable/c/4d8f9065830e526c83199186c5f56a6514f457d2