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 836D85803A9 for ; Fri, 11 Sep 2026 19:50:45 +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=1789156265; cv=none; b=B/MokYlMJvAZPG66nYMx+nDYZ7oDlnbr4pT17AruMtLIxHVYRYwIFKJszp4Tjp9kbP8joD586BtCe++rGHU5mqF4sgneFwRpfQgvS3BtGvE7HXLJJ7xS/TDk3xpUJbV9cOtZ4BoeXJF6sJvpVdsljPWz6u5hT6oGXATaHm3VUNs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789156265; c=relaxed/simple; bh=CVj7ZYoA1xdcbRckE54LTuG7/ddISHjyIu0xaiBWK64=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Y0TvVkUAUiaDxE2+AIEpOgT75y4hSddFlu5bohxukw+rT3MSQSzWFsTaYjmxZ6Sy3nu7KG2qkdM6NtY997rRXnoU0gtSpWQTzhXnGdKUqSm/HM0/6OBIK+yPDkJA30zIpKKyIGbvmPCwOXk5sf2psx0Psav7GMMtjKvza/l3OxQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=VPcoWg5x; 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="VPcoWg5x" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D4AEA1F000FF; Fri, 11 Sep 2026 19:50:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789156245; bh=G5C7KDj7JKEOQiwL95XFxZZfgblnG++nfODsWprf4Y8=; h=From:To:Cc:Subject:Date:Reply-To; b=VPcoWg5xumDRqo/klG9jpGRLhgadSvDgyZfcEbqB5NHTWzV9n+CmP0ZLD98i1d+bL 1E7zJRbWIiqlStTRr6++6stnO0ilR2LDHACDtJBhLmQfdD01Bs89fzy26QYH6iYqa5 UwMHAHDuxBGzX90otD24dnhytzDGZrNtKwEIZQkU= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-89453: iommu/amd: Put PCI device after handling PPR faults Date: Fri, 11 Sep 2026 21:42:22 +0200 Message-ID: <2026091159-CVE-2026-89453-0d4e@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=2860; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=p2A93KDA41425xD6rO98kg1rmWx3SY8dqZShwObrn+Q=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlLIr0tjJtyWXakMmc+P7nl9uNQqy4pqQiZ6fcmn5FfY f/Q4VJARywLgyATg6yYIsuXbTxH91ccUvQytD0NM4eVCWQIAxenAExE/iTDggU+1668/8+0c+vH nsodigcvz5u+fiPD/OLvs98ZsdQdWePCsH3e9oo1/6u2/QAA 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: iommu/amd: Put PCI device after handling PPR faults iommu_call_iopf_notifier() looks up the requester with pci_get_domain_bus_and_slot(), which returns a PCI device with its reference count incremented. Neither the successful iommu_report_device_fault() path nor the abort path drops that reference, so every handled PPR request leaks a PCI device reference. This is the same ownership rule that was fixed for the old iommu_v2 ppr_notifier() path by commit 6cf0981c2233 ("iommu/amd: Fix pci device refcount leak in ppr_notifier()"), but iommu_call_iopf_notifier() was added later as a separate PPR/IOPF notifier path. Drop the PCI device reference after handling the PPR entry. The Linux kernel CVE team has assigned CVE-2026-89453 to this issue. Affected and fixed versions =========================== Issue introduced in 6.10 with commit 978d626b8f1a239acc635323d731c77eae54eb61 and fixed in 6.12.109 with commit 1de4443f85e4405af00153cdf8ba73ff12a65036 Issue introduced in 6.10 with commit 978d626b8f1a239acc635323d731c77eae54eb61 and fixed in 6.18.50 with commit cfc5c1b2caa176dfd40b873a6ff07b11da34cc3e Issue introduced in 6.10 with commit 978d626b8f1a239acc635323d731c77eae54eb61 and fixed in 7.2.4 with commit d1470e16c1977e6c94fadf6048deafaa4d150fec Issue introduced in 6.10 with commit 978d626b8f1a239acc635323d731c77eae54eb61 and fixed in 7.3-rc1 with commit af3b69b16383fbc8fe5f61b5b0150d2e41ede71f 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-2026-89453 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/amd/ppr.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/1de4443f85e4405af00153cdf8ba73ff12a65036 https://git.kernel.org/stable/c/cfc5c1b2caa176dfd40b873a6ff07b11da34cc3e https://git.kernel.org/stable/c/d1470e16c1977e6c94fadf6048deafaa4d150fec https://git.kernel.org/stable/c/af3b69b16383fbc8fe5f61b5b0150d2e41ede71f