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 2CCC5348C7C for ; Sat, 15 Aug 2026 06:07:13 +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=1786774035; cv=none; b=MHEszF7G+3iTKbr/X1c/Vz194cgfmiMFFh8XFYOJm7A3TM4DNqoLXsWlSCL3nnm8dm1hT1FUIxWJluV5hhUcmdO6AYCLM5NmqG0DFktFg6vp3mYslE5GGzTjirSctIICqIExIb6snyGuT2yeESMnKVv7Hhj8Jkxi0+REETUIH5U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786774035; c=relaxed/simple; bh=Z57ejXZnCWLvyLzmO5xAgmU1bIQQVPPiZV/tSQwyL98=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=mPttW1nrY8R+45Ao8DdAogHJDSxg+N0rowCMOjoIE7vJO0qxsH4Sdgpo9Ajw77OiwYYTMAd4vw1cchEm/95niwpdr9RqduFtn/uSaMahRxMn5o4k6W7xxQI75xRm/lNKKsrLYk3G3wN6RFtSVejYj6vaMRu+dNsQdntWLFzEMsA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=FRWxt6df; 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="FRWxt6df" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 302051F000E9; Sat, 15 Aug 2026 06:07:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786774033; bh=My4xFwdtdmPe3pAxGwx9qMPz0zRZOlyBvAMJ9m/cmeg=; h=From:To:Cc:Subject:Date:Reply-To; b=FRWxt6dfQJAPB7+kvlrpkLZDZLD0Rpk8xeqVNHKR68qThFoy8stYmikz88t89IGVt 6VjbDhhMvGYN8PZjdkVdzt1LSQnj8fWdcE0pc38/ylu2PXpKSG2yg761/PImZQXbdn idgYRq7Q00Hd/OV9I4+9prQUkHBtPZtkjXu1I8P0= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-72018: dibs: loopback: validate offset and size in move_data() Date: Sat, 15 Aug 2026 15:01:37 +0900 Message-ID: <2026081509-CVE-2026-72018-ba3f@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=2688; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=WTRTYOfCyYsy0xQOueRIqtAJbOI2y9WAHzN35yf0+VA=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkNDEvZz8//Za3rpcAu7n1mx6ekXg1VRsUue13XSYsD1 l++8fN3RywLgyATg6yYIsuXbTxH91ccUvQytD0NM4eVCWQIAxenAExERZBhftWRCRIX5r5iFKrM 5jpz7xDbPs0tPxjmyipW2h+r+xzIsL7o+NnaEifjPQybAQ== 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: dibs: loopback: validate offset and size in move_data() The loopback move_data() performs a memcpy into the registered DMB without checking whether offset + size exceeds the DMB length. Unlike real ISM hardware, which enforces memory region bounds natively, the software loopback has no such protection. A peer-supplied out-of-bounds offset or oversized write would result in an OOB write past the allocated kernel buffer. Add an explicit bounds check before the memcpy to reject such requests with -EINVAL. The Linux kernel CVE team has assigned CVE-2026-72018 to this issue. Affected and fixed versions =========================== Issue introduced in 6.10 with commit f7a22071dbf316c982fb44308874bd7ad9ac2091 and fixed in 6.12.97 with commit ee188a6b264b71315a67f1b9470faad308b730d2 Issue introduced in 6.10 with commit f7a22071dbf316c982fb44308874bd7ad9ac2091 and fixed in 6.18.40 with commit b2f426a9a22886071966432ede8fceafffe12b8c Issue introduced in 6.10 with commit f7a22071dbf316c982fb44308874bd7ad9ac2091 and fixed in 7.1.5 with commit 94fe0ab01b480b52bd8f977edbd845ef375d69fd Issue introduced in 6.10 with commit f7a22071dbf316c982fb44308874bd7ad9ac2091 and fixed in 7.2-rc3 with commit 78237e3c0720fcc6eb9b87e90fd70f63eeca886f 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-2026-72018 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: drivers/dibs/dibs_loopback.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/ee188a6b264b71315a67f1b9470faad308b730d2 https://git.kernel.org/stable/c/b2f426a9a22886071966432ede8fceafffe12b8c https://git.kernel.org/stable/c/94fe0ab01b480b52bd8f977edbd845ef375d69fd https://git.kernel.org/stable/c/78237e3c0720fcc6eb9b87e90fd70f63eeca886f