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 4AC6137187E for ; Sat, 15 Aug 2026 12:29:48 +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=1786796989; cv=none; b=lB42DLjSSuzB7P5+dk8JIr6xU7dlUs4B7cyqX74mSCV4u/lHg5Iymnd2A45fgZ0Ql1e2YeD0R/C8LXv39kEHkZaEYqePruBx1hQGTHXJqvWfe+8294LSXCkGTEXtag2Cfn5g5ue3xvBMGqaiC5MVvOUH6FI5/bmx58Vt6jB0jiQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786796989; c=relaxed/simple; bh=8U4VLPYI6rN0il1vVuqVoKqT2pAPaJwTAFugcZwIGDM=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=mXA0PtBBtAzrmbl/vimIkcghyUN/eiZhmVq80pO7OBX6734Qhyg8QCfiNDt07Ht6h/n0afAsUkwdliGb5YZ3XPgBaXfkB+V8WDfkB17CJMWhMHfhRvGJhLOlPCORKdyooRG8YPOi+5C9xc4yVkfJTQmyOs16su1oQ00lli7SRLA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=P/mogvrD; 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="P/mogvrD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A3F751F000E9; Sat, 15 Aug 2026 12:29:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786796988; bh=Z7Ax2jFvriF1obPAcPyDg5sPkThZko01i71ktOe6gzg=; h=From:To:Cc:Subject:Date:Reply-To; b=P/mogvrDQfbq37Whx0Av25pUzFsJcOvJUkgn6kazod3CzLMP3HYTesuUXLeI+mnav iBREjLdH3dy72yuMxwN2w3grXL0roltxtD9ZXl7ib7lMne4sPEpxx2qKrEIFcn8T4H TlHBPV7YNmKBc8OP5xGsLEPvxXgFLqLsu8YrCfaY= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-74464: net: openvswitch: fix skb leak on flow key update failure during ct Date: Sat, 15 Aug 2026 21:25:45 +0900 Message-ID: <2026081533-CVE-2026-74464-c410@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=2958; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=ab3Rb9YlzgF3qxAQXzhnHgu2Y8j+sEdsAAv2MHC6eLQ=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkNUXv784oOzr1VnFz3tPzihuTP27deKUz4oq6Rnqa89 eW71hMzO2JZGASZGGTFFFm+bOM5ur/ikKKXoe1pmDmsTCBDGLg4BWAi4Q8YFjRzywsbTPx0fU/i EbG1C5Ssrqh7lzIs2PJYsv7Csp4etqmnHjsE9S//OqPtAgA= 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: net: openvswitch: fix skb leak on flow key update failure during ct ovs_ct_execute() always steals or frees the skb on failure while ovs_flow_key_update() does not. So, if it fails and we return right away, the skb ends up leaked. Fix that by breaking instead and letting the common error handling code at the bottom of the loop to free the skb properly. This is a very unlikely scenario as it requires the packet to become unparseable by applying a set of actions on a previously parseable skb, but should be fixed nevertheless. Reported by Sashiko. The Linux kernel CVE team has assigned CVE-2026-74464 to this issue. Affected and fixed versions =========================== Issue introduced in 4.3 with commit ec0d043d05e6e3c0c2fac5de922c800c027c6386 and fixed in 6.6.151 with commit 736e972f3f8a304158345223ac6e816166a467ce Issue introduced in 4.3 with commit ec0d043d05e6e3c0c2fac5de922c800c027c6386 and fixed in 6.12.103 with commit e84dfaac50aab45ad8c670da43e3aa1f97bd2a41 Issue introduced in 4.3 with commit ec0d043d05e6e3c0c2fac5de922c800c027c6386 and fixed in 6.18.44 with commit e0ba8eaef2a0d02a7a485e6a7157e47272b65cea Issue introduced in 4.3 with commit ec0d043d05e6e3c0c2fac5de922c800c027c6386 and fixed in 7.1.8 with commit 393f3c72600ab6721d732a0ab245bc896c5b28fc Issue introduced in 4.3 with commit ec0d043d05e6e3c0c2fac5de922c800c027c6386 and fixed in 7.2-rc6 with commit bc62e843bc48f933da765ce47079fd992e535794 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-2026-74464 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/openvswitch/actions.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/736e972f3f8a304158345223ac6e816166a467ce https://git.kernel.org/stable/c/e84dfaac50aab45ad8c670da43e3aa1f97bd2a41 https://git.kernel.org/stable/c/e0ba8eaef2a0d02a7a485e6a7157e47272b65cea https://git.kernel.org/stable/c/393f3c72600ab6721d732a0ab245bc896c5b28fc https://git.kernel.org/stable/c/bc62e843bc48f933da765ce47079fd992e535794