Answer in brief
CVE-2026-80821 records a Unknown severity vulnerability in nvmet: pci-epf: put CQ ref on create_cq mapping failure. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186 <f31650243c1ab32394077f234685e89ed8dece84 || >=0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186 <b5f97fae2503a763fa0f953abf5f121b0fef7d0d || >=0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186 <56a7b6a6880dbabe28214ff88df8d229ca3a944a || >=0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186 <659ae9d02cb5d72c76f74fff7441eb8fb64d8f5c | f31650243c1ab32394077f234685e89ed8dece84, b5f97fae2503a763fa0f953abf5f121b0fef7d0d, 56a7b6a6880dbabe28214ff88df8d229ca3a944a, 659ae9d02cb5d72c76f74fff7441eb8fb64d8f5c |
| Linux/Linuxgeneric | 6.14 | Not reported |
Published upstream
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 4, 2026
In the Linux kernel, the following vulnerability has been resolved: nvmet: pci-epf: put CQ ref on create_cq mapping failure nvmet_pci_epf_create_cq() calls nvmet_cq_create(), which takes a reference on the controller and installs the completion queue. If the subsequent PCI address-space mapping fails or returns a too-small partial mapping, the function jumps to err_internal / err_unmap_queue without calling nvmet_cq_put(). The matching put in nvmet_pci_epf_delete_cq() is gated on NVMET_PCI_EPF_Q_LIVE, which is only set after the mapping succeeds, so teardown never releases these references. A remote PCI host that drives Create IO CQ commands with a failing PRP1/pci_addr therefore leaks the CQ and a controller reference on each attempt. Drop the CQ reference on the mapping-failure paths. The err_internal and err_unmap_queue labels are only reachable after nvmet_cq_create() has succeeded, so this pairs the create/put correctly.
Quoted source text, attributed separately from HOL analysis.