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 2CCD21F95E for ; Thu, 22 Aug 2024 03:33:37 +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=1724297617; cv=none; b=eFkbpKHN1jpyTpG3I0dqYJjSsgATmOuRzaYk+2qCF1JC1/9j0qW51zHeSQR+YqNT/w45jTNMFMGdWVYp1vAVsVa71quMVFCmPqKOvtSJh78Qo1Cs3rcxubBr4ec+y4CaUXk/PWp5hsTE91lLFOEJAmZ6u4/c4v0PD3AOoHYVKB0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724297617; c=relaxed/simple; bh=VhvutKV/kQK+JccmP0OuKhkv5bucxFXxvWh8HPydHyg=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=qQX+OJoQB9dajMU3hpJkZsJtI55YSUudtvGvbfHvpcvbyOsn0/UhInE/JBITTCS65N2OtPynkSSWXNOFdta/YcMMQblQ+Skgwcn5oVbWifYPRb0ywVNd21dxhU6JsccRSumD/REtKntOt1S4eIzD0cU+8/DqEbpoIEcZKNoKgr8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=EudtCZPX; 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="EudtCZPX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id ACFC5C4AF0B; Thu, 22 Aug 2024 03:33:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1724297617; bh=VhvutKV/kQK+JccmP0OuKhkv5bucxFXxvWh8HPydHyg=; h=From:To:Cc:Subject:Date:Reply-to:From; b=EudtCZPXCp5fKr2fHYDj0PvobvEixJs38fS/XmMmGpy9DnZUsbCcTm7G5sfOd43Gh 7Ae1ftKfAU7SnB8Q2OmyRph16AGF3E820sgYIw/Yy02toWTgqWhQ3n3HO072Y6uPYf Sp8WWGjPO8Uotz6tSEK3BFEV9YNRu4dbyHICxsdI= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2022-48933: netfilter: nf_tables: fix memory leak during stateful obj update Date: Thu, 22 Aug 2024 11:31:34 +0800 Message-ID: <2024082223-CVE-2022-48933-6ebb@gregkh> X-Mailer: git-send-email 2.46.0 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=2687; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=VhvutKV/kQK+JccmP0OuKhkv5bucxFXxvWh8HPydHyg=; b=owGbwMvMwCRo6H6F97bub03G02pJDGnHNnIz9Ra8Utr7tMOObWnTJefwaed0XATjt7rl7Vik8 PpHwR/3jlgWBkEmBlkxRZYv23iO7q84pOhlaHsaZg4rE8gQBi5OAZhIwiOGBTvenvU+1Cc44fj/ Wds2TtQWK9KafZJhwQwnT8lvvxvTFn659/ga59F381VmsAMA 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: nf_tables: fix memory leak during stateful obj update stateful objects can be updated from the control plane. The transaction logic allocates a temporary object for this purpose. The ->init function was called for this object, so plain kfree() leaks resources. We must call ->destroy function of the object. nft_obj_destroy does this, but it also decrements the module refcount, but the update path doesn't increment it. To avoid special-casing the update object release, do module_get for the update case too and release it via nft_obj_destroy(). The Linux kernel CVE team has assigned CVE-2022-48933 to this issue. Affected and fixed versions =========================== Issue introduced in 5.4 with commit d62d0ba97b58 and fixed in 5.4.182 with commit 53026346a94c Issue introduced in 5.4 with commit d62d0ba97b58 and fixed in 5.10.103 with commit 7e9880e81d3f Issue introduced in 5.4 with commit d62d0ba97b58 and fixed in 5.15.26 with commit e96e204ee6fa Issue introduced in 5.4 with commit d62d0ba97b58 and fixed in 5.16.12 with commit 34bb90e407e3 Issue introduced in 5.4 with commit d62d0ba97b58 and fixed in 5.17 with commit dad3bdeef45f 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-2022-48933 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/53026346a94c43f35c32b18804041bc483271d87 https://git.kernel.org/stable/c/7e9880e81d3fd6a43c202f205717485290432826 https://git.kernel.org/stable/c/e96e204ee6fa46702f6c94c3c69a09e69e0eac52 https://git.kernel.org/stable/c/34bb90e407e3288f610558beaae54ecaa32b11c4 https://git.kernel.org/stable/c/dad3bdeef45f81a6e90204bcc85360bb76eccec7