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 69E743A873A for ; Sun, 19 Jul 2026 15:46:17 +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=1784475978; cv=none; b=HDNmfmu21HqdZy/bPiLxr9oyihZZdlc2OMZPNuppmueMlVUzQVgDo/qeIZ+EbQv+z9gCrFOgA0Ncf0ytHRrLwj2kjVdaBD4yG8TkpqNfn1G5dpPBniy70Xne8/l7zOU+AvzmB+90VCduftVPfthSo12jIYgmyABuZsH8ZQ7gxUY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784475978; c=relaxed/simple; bh=jS2pCUJxyJdIRdXUNWSMQXO+FFDIDRB2x5gBZqPsBHQ=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=q01LXq/5tKQ9kaIPFNfbbLln9mX+G0qdnJNr9yw4NTLBcwDLc2jiBjCr+RPX1EauwsUc0EB43U+ro0Dr358FP1O2PloMi42GjPIwL92Gf9uZ/jYFx4esw4NjzAlxPPyXnsJRm8nESuuZTBJolk+AshhU4nn2kSxwYxRekoRwEHE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=krUPbbAV; 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="krUPbbAV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CC8231F000E9; Sun, 19 Jul 2026 15:46:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784475977; bh=vogrgFIDxMaUhxZ1N+976PcfgDiMyoq/oQ50gnp3HyI=; h=From:To:Cc:Subject:Date:Reply-To; b=krUPbbAVkchXqnkk62dN7/PMZpbFhablLn0/M+NP29vxwbwIIZwx+dYxjl1khB0Is qZhukBAf05yQGUr8Z7blKu5ttDuYP+E4kOZeiGvKWRY2FczxIQMqcRU4UwYUIztFkZ 6MO9hfIvQ/cRWjXnXUhOTA8w8yn2HG4wFij3jDcU= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-64151: iommupt: Check for missing PAGE_SIZE in the pgsize_bitmap Date: Sun, 19 Jul 2026 17:40:13 +0200 Message-ID: <2026071931-CVE-2026-64151-1bcc@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=2104; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=kU2wTnGFJA0QHXBlO0sfMm4lM38c4Pd735dP4J0x4Bc=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkx78sfaepd2C9qZ2m/9eP0m9crZQrs9TecWKZguvxzi VCB0VPhjlgWBkEmBlkxRZYv23iO7q84pOhlaHsaZg4rE8gQBi5OAZjI/laGBZtjC6fP+O17LVdh 3UPueu3ZApplqQxzRUN+V8nP+Cj8tu0Yj5hYqPvEjCcfAQ== 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: iommupt: Check for missing PAGE_SIZE in the pgsize_bitmap Sashiko pointed out that the driver could drop PAGE_SIZE from the pgsize_bitmap. That is technically allowed but nothing does it, and such an iommu_domain would not be used with the DMA API today. Still, it is against the design and it is trivial to fix up. Lift the PT_WARN_ON to the if branch and just skip the fast path. The Linux kernel CVE team has assigned CVE-2026-64151 to this issue. Affected and fixed versions =========================== Issue introduced in 6.19 with commit dcd6a011a8d523a114af2360a8753de5bd60c139 and fixed in 7.0.11 with commit 00850f41da24423587abd6124a790dd4f12bcef3 Issue introduced in 6.19 with commit dcd6a011a8d523a114af2360a8753de5bd60c139 and fixed in 7.1 with commit 8ef3f77c440005c7f04229a75976bfc078364247 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-2026-64151 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/iommu/generic_pt/iommu_pt.h 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/00850f41da24423587abd6124a790dd4f12bcef3 https://git.kernel.org/stable/c/8ef3f77c440005c7f04229a75976bfc078364247