CVE-2026-80821
kernel: nvmet: pci-epf: put CQ ref on create_cq mapping failure
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 4, 2026
Updated · October 8, 2026
Description
A flaw was found in the Linux kernel's nvmet PCI Express Endpoint Function (PCI-EPF) component. A remote attacker can exploit this vulnerability by sending specially crafted Create IO Completion Queue (CQ) commands. This leads to a resource leak, as the system fails to properly release references to the completion queue and controller. Repeated exploitation of this flaw could result in a Denial of Service (DoS).
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-772 · Missing Release of Resource after Effective Lifetime