CVE-2026-80821

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80821", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.795Z", "datePublished": "2026-09-04T15:27:42.612Z", "dateUpdated": "2026-10-19T08:44:13.912Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:44:13.912Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet: pci-epf: put CQ ref on create_cq mapping failure\n\nnvmet_pci_epf_create_cq() calls nvmet_cq_create(), which takes a\nreference on the controller and installs the completion queue. If the\nsubsequent PCI address-space mapping fails or returns a too-small partial\nmapping, the function jumps to err_internal / err_unmap_queue without\ncalling nvmet_cq_put(). The matching put in nvmet_pci_epf_delete_cq() is\ngated on NVMET_PCI_EPF_Q_LIVE, which is only set after the mapping\nsucceeds, so teardown never releases these references. A remote PCI host\nthat drives Create IO CQ commands with a failing PRP1/pci_addr therefore\nleaks the CQ and a controller reference on each attempt.\n\nDrop the CQ reference on the mapping-failure paths. The err_internal and\nerr_unmap_queue labels are only reachable after nvmet_cq_create() has\nsucceeded, so this pairs the create/put correctly."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvme/target/pci-epf.c"], "versions": [{"version": "0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186", "lessThan": "f31650243c1ab32394077f234685e89ed8dece84", "status": "affected", "versionType": "git"}, {"version": "0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186", "lessThan": "b5f97fae2503a763fa0f953abf5f121b0fef7d0d", "status": "affected", "versionType": "git"}, {"version": "0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186", "lessThan": "56a7b6a6880dbabe28214ff88df8d229ca3a944a", "status": "affected", "versionType": "git"}, {"version": "0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186", "lessThan": "659ae9d02cb5d72c76f74fff7441eb8fb64d8f5c", "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/nvme/target/pci-epf.c"], "versions": [{"version": "6.14", "status": "affected"}, {"version": "0", "lessThan": "6.14", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.47", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.11", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.1", "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": "6.14", "versionEndExcluding": "6.18.47"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.1.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.2.1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f31650243c1ab32394077f234685e89ed8dece84"}, {"url": "https://git.kernel.org/stable/c/b5f97fae2503a763fa0f953abf5f121b0fef7d0d"}, {"url": "https://git.kernel.org/stable/c/56a7b6a6880dbabe28214ff88df8d229ca3a944a"}, {"url": "https://git.kernel.org/stable/c/659ae9d02cb5d72c76f74fff7441eb8fb64d8f5c"}], "title": "nvmet: pci-epf: put CQ ref on create_cq mapping failure", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/nvme/target/pci-epf.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "f31650243c1ab32394077f234685e89ed8dece84", "status": "affected", "version": "0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186", "versionType": "git"}, {"lessThan": "b5f97fae2503a763fa0f953abf5f121b0fef7d0d", "status": "affected", "version": "0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186", "versionType": "git"}, {"lessThan": "56a7b6a6880dbabe28214ff88df8d229ca3a944a", "status": "affected", "version": "0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186", "versionType": "git"}, {"lessThan": "659ae9d02cb5d72c76f74fff7441eb8fb64d8f5c", "status": "affected", "version": "0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/nvme/target/pci-epf.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.14"}, {"lessThan": "6.14", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.47", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.11", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.1", "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\nnvmet: pci-epf: put CQ ref on create_cq mapping failure\n\nnvmet_pci_epf_create_cq() calls nvmet_cq_create(), which takes a\nreference on the controller and installs the completion queue. If the\nsubsequent PCI address-space mapping fails or returns a too-small partial\nmapping, the function jumps to err_internal / err_unmap_queue without\ncalling nvmet_cq_put(). The matching put in nvmet_pci_epf_delete_cq() is\ngated on NVMET_PCI_EPF_Q_LIVE, which is only set after the mapping\nsucceeds, so teardown never releases these references. A remote PCI host\nthat drives Create IO CQ commands with a failing PRP1/pci_addr therefore\nleaks the CQ and a controller reference on each attempt.\n\nDrop the CQ reference on the mapping-failure paths. The err_internal and\nerr_unmap_queue labels are only reachable after nvmet_cq_create() has\nsucceeded, so this pairs the create/put correctly."}], "id": "CVE-2026-80821", "lastModified": "2026-10-19T09:17:16.970", "metrics": {}, "published": "2026-09-04T16:18:09.857", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/56a7b6a6880dbabe28214ff88df8d229ca3a944a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/659ae9d02cb5d72c76f74fff7441eb8fb64d8f5c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b5f97fae2503a763fa0f953abf5f121b0fef7d0d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f31650243c1ab32394077f234685e89ed8dece84"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186,f31650243c1ab32394077f234685e89ed8dece84)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186,b5f97fae2503a763fa0f953abf5f121b0fef7d0d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186,56a7b6a6880dbabe28214ff88df8d229ca3a944a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186,659ae9d02cb5d72c76f74fff7441eb8fb64d8f5c)"}}], "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": "semver", "value": "6.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.47,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.11,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.1,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "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": "2026-09-04T16:45:04.799657+00:00", "updated": "2026-09-04T17:30:17.954618+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-401"]}