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CVE-2023-54033

kernel: kernel: Denial of Service via memory leak in LRU hash maps

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · December 24, 2025

Updated · June 30, 2026

Description

A flaw was found in the Linux kernel. A local user could exploit a memory leak vulnerability in the Least Recently Used (LRU) and LRU_PERCPU hash maps. This occurs when the kernel allocates a new element during a map update but fails to release it if the hash table bucket cannot be locked. Repeated exploitation of this flaw can lead to resource exhaustion, resulting in a permanent 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 · 5.5
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