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 82EBD1C68F for ; Fri, 24 Apr 2026 14:30:41 +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=1777041041; cv=none; b=ZtaipcM7i+qsEmjR3ulOF1o8x3ISDN81l7x5quHQO/28eXvI99Y8jaNo5wjMVW6pCVnPd759w8mDAT8A02Q33pD+lo4nD3lBXQvCgVqbT4NqeZ5skm1/r0Bu8j+OOQmKYQoWgBqrCTHCoi9CayK3EQXexNGTJ0qhRSIpsb6n9N4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777041041; c=relaxed/simple; bh=n0amVu2yq+YB9U7axy3lurX15Oc1CaNYIc3wvysXDBo=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=TcSl/go1VabTol6a7GSQsOWuwg/4UEI0uA8kMNNCWocYj+1u6Tp8/kWFeJ8uk5hCyrlaPWDs11uo/KZQcabjsazhhwoGq/EbKHIHvPGHHne0uMCtsMzQszFMLWIuT+XT1ScEj7PWabcbBtSAGx6Ep7FiygCgfj71TM5eFNC68bs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=1IFk/2LA; 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="1IFk/2LA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E96BCC2BCB2; Fri, 24 Apr 2026 14:30:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1777041041; bh=n0amVu2yq+YB9U7axy3lurX15Oc1CaNYIc3wvysXDBo=; h=From:To:Cc:Subject:Date:Reply-To:From; b=1IFk/2LA+DVLPRJ+WHBJ8u4YZl0+SL4DSdIhdqZq6egeIVySocFBDrwRkbW1jsa3w CAIJiAqOhUj0ftsCdFpCjQqVFLHAGTjFdF47szBTnIAJBMeTEv4Pv6eSsDwxjANpCd +uGuqIa43pwgb0aWJZkY7A02U41DEgJKlk/Bc13g= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-31534: smb: client: let send_done handle a completion without IB_SEND_SIGNALED Date: Fri, 24 Apr 2026 16:30:32 +0200 Message-ID: <2026042431-CVE-2026-31534-059e@gregkh> X-Mailer: git-send-email 2.53.0 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=2024; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=/dJUApvz9ebe275r1sUzQLgfxG1TvBdli3dVHP3aa+g=; b=owGbwMvMwCRo6H6F97bub03G02pJDJmv69r/FGW07LgwIWVdyw7jWxXBbqqZ1YyzuZ4//J5iU rW/9YlSRywLgyATg6yYIsuXbTxH91ccUvQytD0NM4eVCWQIAxenAExkzSqGBRcs1Xw6z7+qWrjz SNHGc6vT/Mw9XjPMd7dfXMDiqHgzkWXfXckC7+MWjzMnAgA= 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: smb: client: let send_done handle a completion without IB_SEND_SIGNALED With smbdirect_send_batch processing we likely have requests without IB_SEND_SIGNALED, which will be destroyed in the final request that has IB_SEND_SIGNALED set. If the connection is broken all requests are signaled even without explicit IB_SEND_SIGNALED. The Linux kernel CVE team has assigned CVE-2026-31534 to this issue. Affected and fixed versions =========================== Fixed in 6.18.11 with commit 16c8be3d55441287ddd334e25df4cc376450dec9 Fixed in 6.19.1 with commit 86d9742c3f7ed7eba677517c80b4597822750e65 Fixed in 7.0 with commit cf74fcdc43b322b6188a0750b5ee79e38be6d078 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-2026-31534 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/smb/client/smbdirect.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/16c8be3d55441287ddd334e25df4cc376450dec9 https://git.kernel.org/stable/c/86d9742c3f7ed7eba677517c80b4597822750e65 https://git.kernel.org/stable/c/cf74fcdc43b322b6188a0750b5ee79e38be6d078