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 E474A3F0AAD for ; Fri, 8 May 2026 14:27:07 +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=1778250428; cv=none; b=oHndXXn/V2P1GbuzAehz07MOFA6gwMb+aC2XgvLrivvQvTXJe5irMLBKbOxvyI/GPzj2JDC2V2TqIb7//MKC1UqRj6XMsKFix5AYObyzKGRk19B4muTCW7U3OC/iz/KTPvJpB70b816Pp9t6roCz56kTZxovR+yOoOmDm4NcvsU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778250428; c=relaxed/simple; bh=j/7968jymSLJo+CR9VRNzcVGkmSyDdMji+e8JmNmVOc=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=IgTq3J5DdxLUN4p5N0or8ONigXQt0K5T/bi3zwUlA2F8ej9+eJ3O41unCURH+uInTaCQNEeVcPoMCQyvqEEMhIH8RmiO0staU68qJhDJynGQMrYdXPKupWXyKQDPyv9XQzHgmo21yqHU9YcDtDYk94xQ5Zip18lD3oNyUuRaFm4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=MrBSMHn/; 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="MrBSMHn/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 45DACC2BCB0; Fri, 8 May 2026 14:27:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778250427; bh=j/7968jymSLJo+CR9VRNzcVGkmSyDdMji+e8JmNmVOc=; h=From:To:Cc:Subject:Date:Reply-To:From; b=MrBSMHn/hry6V4GG4DWzMgT5gQhwdjAC8wiJiOs8V+d9dU9DuzLd8orjuqJHg53uB zSRYndoVKI676hPce2jhHbWOuhvRJ77yLN0K7k/77xo9Q1kpZYbmSVfFxJZgLWrFXk jvH4t+ZsXNlnh3y9XFG7W9L1WnYjiskJdPU0gCWk= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-43454: netfilter: nf_tables: Fix for duplicate device in netdev hooks Date: Fri, 8 May 2026 16:23:03 +0200 Message-ID: <2026050859-CVE-2026-43454-83f9@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=2225; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=vOMLCd1JEneZLYCG8TqX7msUSIMCaegDXt22ZEVcdfI=; b=owGbwMvMwCRo6H6F97bub03G02pJDJl/P7YnVjPvfWeU37hL5B3fYuWSx/ebvsWld7dcfi7e8 ObiwR36HbEsDIJMDLJiiixftvEc3V9xSNHL0PY0zBxWJpAhDFycAjCRXcIM80uqost0ajtLTBb+ spi/TurCRTHtuwzzQ3Jm2nOW7fnT+WnbhIXiVZNf73ksCwA= 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: netfilter: nf_tables: Fix for duplicate device in netdev hooks When handling NETDEV_REGISTER notification, duplicate device registration must be avoided since the device may have been added by nft_netdev_hook_alloc() already when creating the hook. The Linux kernel CVE team has assigned CVE-2026-43454 to this issue. Affected and fixed versions =========================== Issue introduced in 6.16 with commit a331b78a552551d0e404e58e6390b1c828d6af8f and fixed in 6.18.19 with commit 6d2a95c6890577cc3eab2b20018e16850d7fb094 Issue introduced in 6.16 with commit a331b78a552551d0e404e58e6390b1c828d6af8f and fixed in 6.19.9 with commit 2041cdb078041611510fc189410bc70b29f688fb Issue introduced in 6.16 with commit a331b78a552551d0e404e58e6390b1c828d6af8f and fixed in 7.0 with commit b7cdc5a97d02c943f4bdde4d5767ad0c13cad92b 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-2026-43454 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 net/netfilter/nft_chain_filter.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/6d2a95c6890577cc3eab2b20018e16850d7fb094 https://git.kernel.org/stable/c/2041cdb078041611510fc189410bc70b29f688fb https://git.kernel.org/stable/c/b7cdc5a97d02c943f4bdde4d5767ad0c13cad92b