CVE-2026-89453

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89453", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.706Z", "datePublished": "2026-09-11T19:43:18.068Z", "dateUpdated": "2026-10-19T08:47:02.825Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:47:02.825Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/amd: Put PCI device after handling PPR faults\n\niommu_call_iopf_notifier() looks up the requester with\npci_get_domain_bus_and_slot(), which returns a PCI device with its\nreference count incremented.\n\nNeither the successful iommu_report_device_fault() path nor the abort\npath drops that reference, so every handled PPR request leaks a PCI\ndevice reference.\n\nThis is the same ownership rule that was fixed for the old iommu_v2\nppr_notifier() path by commit 6cf0981c2233 (\"iommu/amd: Fix pci device\nrefcount leak in ppr_notifier()\"), but iommu_call_iopf_notifier() was\nadded later as a separate PPR/IOPF notifier path.\n\nDrop the PCI device reference after handling the PPR entry."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/iommu/amd/ppr.c"], "versions": [{"version": "978d626b8f1a239acc635323d731c77eae54eb61", "lessThan": "1de4443f85e4405af00153cdf8ba73ff12a65036", "status": "affected", "versionType": "git"}, {"version": "978d626b8f1a239acc635323d731c77eae54eb61", "lessThan": "cfc5c1b2caa176dfd40b873a6ff07b11da34cc3e", "status": "affected", "versionType": "git"}, {"version": "978d626b8f1a239acc635323d731c77eae54eb61", "lessThan": "d1470e16c1977e6c94fadf6048deafaa4d150fec", "status": "affected", "versionType": "git"}, {"version": "978d626b8f1a239acc635323d731c77eae54eb61", "lessThan": "af3b69b16383fbc8fe5f61b5b0150d2e41ede71f", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/iommu/amd/ppr.c"], "versions": [{"version": "6.10", "status": "affected"}, {"version": "0", "lessThan": "6.10", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/1de4443f85e4405af00153cdf8ba73ff12a65036"}, {"url": "https://git.kernel.org/stable/c/cfc5c1b2caa176dfd40b873a6ff07b11da34cc3e"}, {"url": "https://git.kernel.org/stable/c/d1470e16c1977e6c94fadf6048deafaa4d150fec"}, {"url": "https://git.kernel.org/stable/c/af3b69b16383fbc8fe5f61b5b0150d2e41ede71f"}], "title": "iommu/amd: Put PCI device after handling PPR faults", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/iommu/amd/ppr.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "1de4443f85e4405af00153cdf8ba73ff12a65036", "status": "affected", "version": "978d626b8f1a239acc635323d731c77eae54eb61", "versionType": "git"}, {"lessThan": "cfc5c1b2caa176dfd40b873a6ff07b11da34cc3e", "status": "affected", "version": "978d626b8f1a239acc635323d731c77eae54eb61", "versionType": "git"}, {"lessThan": "d1470e16c1977e6c94fadf6048deafaa4d150fec", "status": "affected", "version": "978d626b8f1a239acc635323d731c77eae54eb61", "versionType": "git"}, {"lessThan": "af3b69b16383fbc8fe5f61b5b0150d2e41ede71f", "status": "affected", "version": "978d626b8f1a239acc635323d731c77eae54eb61", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/iommu/amd/ppr.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.10"}, {"lessThan": "6.10", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/amd: Put PCI device after handling PPR faults\n\niommu_call_iopf_notifier() looks up the requester with\npci_get_domain_bus_and_slot(), which returns a PCI device with its\nreference count incremented.\n\nNeither the successful iommu_report_device_fault() path nor the abort\npath drops that reference, so every handled PPR request leaks a PCI\ndevice reference.\n\nThis is the same ownership rule that was fixed for the old iommu_v2\nppr_notifier() path by commit 6cf0981c2233 (\"iommu/amd: Fix pci device\nrefcount leak in ppr_notifier()\"), but iommu_call_iopf_notifier() was\nadded later as a separate PPR/IOPF notifier path.\n\nDrop the PCI device reference after handling the PPR entry."}], "id": "CVE-2026-89453", "lastModified": "2026-10-19T09:17:37.600", "metrics": {}, "published": "2026-09-11T20:19:25.967", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1de4443f85e4405af00153cdf8ba73ff12a65036"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/af3b69b16383fbc8fe5f61b5b0150d2e41ede71f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cfc5c1b2caa176dfd40b873a6ff07b11da34cc3e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d1470e16c1977e6c94fadf6048deafaa4d150fec"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: IOMMU AMD driver resource leak can lead to denial of service", "id": "2532501", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532501"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-911", "details": ["A flaw was found in the Linux kernel's IOMMU (Input/Output Memory Management Unit) driver for AMD. This vulnerability occurs when the system handles certain memory access errors, specifically Page Request (PPR) faults, without properly releasing a reference to a PCI device. This oversight causes a resource leak, where system resources are not freed as expected. Over time, this could lead to resource exhaustion, potentially allowing a local attacker to cause a denial of service (DoS) on the system."], "name": "CVE-2026-89453", "public_date": "2026-09-11T19:43:18Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89453\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89453\nhttps://git.kernel.org/stable/c/1de4443f85e4405af00153cdf8ba73ff12a65036\nhttps://git.kernel.org/stable/c/af3b69b16383fbc8fe5f61b5b0150d2e41ede71f\nhttps://git.kernel.org/stable/c/cfc5c1b2caa176dfd40b873a6ff07b11da34cc3e\nhttps://git.kernel.org/stable/c/d1470e16c1977e6c94fadf6048deafaa4d150fec"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[978d626b8f1a239acc635323d731c77eae54eb61,1de4443f85e4405af00153cdf8ba73ff12a65036)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[978d626b8f1a239acc635323d731c77eae54eb61,cfc5c1b2caa176dfd40b873a6ff07b11da34cc3e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[978d626b8f1a239acc635323d731c77eae54eb61,d1470e16c1977e6c94fadf6048deafaa4d150fec)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[978d626b8f1a239acc635323d731c77eae54eb61,af3b69b16383fbc8fe5f61b5b0150d2e41ede71f)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.10"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.10)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.109,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T19:00:08.854551+00:00", "updated": "2026-09-21T01:30:08.757697+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}