Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186 before f31650243c1ab32394077f234685e89ed8dece84; affected 0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186 before b5f97fae2503a763fa0f953abf5f121b0fef7d0d; affected 0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186 before 56a7b6a6880dbabe28214ff88df8d229ca3a944a; affected 0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186 before 659ae9d02cb5d72c76f74fff7441eb8fb64d8f5c |
| Linux / Linux | affected 6.14; unaffected 0 before 6.14; unaffected 6.18.47 through 6.18.*; unaffected 7.1.11 through 7.1.*; unaffected 7.2.1 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.