{"id":"CVE-2026-80821","revision":"4db4770b5b0144b29c708ef7caa2a5ff","records":[{"revision":"4db4770b5b0144b29c708ef7caa2a5ff","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80821","aliases":[],"title":"nvmet: pci-epf: put CQ ref on create_cq mapping failure","description":"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.","state":0,"publishedAt":"2026-09-04T15:27:42.612+00:00","modifiedAt":"2026-10-19T08:44:13.912+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/nvme/target/pci-epf.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186\",\n                            \"lessThan\": \"f31650243c1ab32394077f234685e89ed8dece84\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186\",\n                            \"lessThan\": \"b5f97fae2503a763fa0f953abf5f121b0fef7d0d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186\",\n                            \"lessThan\": \"56a7b6a6880dbabe28214ff88df8d229ca3a944a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186\",\n                            \"lessThan\": \"659ae9d02cb5d72c76f74fff7441eb8fb64d8f5c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/nvme/target/pci-epf.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.14\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.14\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.47\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.11\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.1\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/f31650243c1ab32394077f234685e89ed8dece84","https://git.kernel.org/stable/c/b5f97fae2503a763fa0f953abf5f121b0fef7d0d","https://git.kernel.org/stable/c/56a7b6a6880dbabe28214ff88df8d229ca3a944a","https://git.kernel.org/stable/c/659ae9d02cb5d72c76f74fff7441eb8fb64d8f5c"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80821","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80821","identifiers":["CVE-2026-80821"]},"retained":false,"historicalAffected":[]}],"coverage":[]}