CVE-2025-68814

kernel: Linux kernel: Memory leak in io_uring's __io_openat_prep() leading to denial of service

Loading…

Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · January 13, 2026

Updated · June 28, 2026

Description

A flaw was found in the Linux kernel's io_uring subsystem. A local user could exploit this vulnerability due to a memory leak in the __io_openat_prep() function. This occurs when a file is installed in the fixed file table with the O_CLOEXEC flag set, leading to the struct filename memory not being properly cleaned up. This memory leak could result in a denial of service (DoS) on the system.

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