CVE-2026-80821: Linux

Описание

Оригинално описание

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.

Засегнати продукти

• Linux Linux: 0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186 преди f31650243c1ab32394077f234685e89ed8dece84; 0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186 преди b5f97fae2503a763fa0f953abf5f121b0fef7d0d; 0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186 преди 56a7b6a6880dbabe28214ff88df8d229ca3a944a; 0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186 преди 659ae9d02cb5d72c76f74fff7441eb8fb64d8f5c
• Linux Linux: 6.14; преди 6.14; 6.18.47 до 6.18.*; 7.1.11 до 7.1.*; 7.2.1 до 7.2.*; 7.3 до *

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-80821
• https://nvd.nist.gov/vuln/detail/CVE-2026-80821
• 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