CVE-2023-54004

kernel: Linux kernel UDPLITE: Denial of Service via null pointer dereference

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · December 24, 2025

Updated · August 5, 2026

Description

A flaw was found in the Linux kernel's UDPLITE (UDP-Lite) implementation. A local user can exploit a null pointer dereference in the __sk_mem_raise_allocated() function by using the IPPROTO_UDPLITE protocol. This vulnerability can lead to a system crash, resulting 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 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-476 · NULL Pointer Dereference