CVE-2026-80811

kernel: io_uring/cmd: fix iovec leak when the async cmd is not recycled

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Severity

Low

Red Hat Product Security

5.5

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 io_uring/cmd component. This vulnerability allows for a memory leak due to iovec arrays not being properly freed when asynchronous commands are not recycled. An attacker could potentially exploit this by triggering specific workloads, such as NVMe passthrough, leading to resource exhaustion and a Denial of Service (DoS) condition.

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 · 5.5
CVSS: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