CVE-2023-54238
kernel: Linux kernel: Denial of Service in mlx5 driver due to memory leaks
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · December 30, 2025
Updated · August 5, 2026
Description
A flaw was found in the Linux kernel's mlx5 driver. During a Precision Time Protocol (PTP) resynchronization operation, socket buffers (SKBs) were not properly freed, leading to a memory leak. Additionally, an error in the mlx5e_skb_fifo_has_room() function's counter check could cause further resource leaks. A local attacker with low privileges could exploit these memory and resource leaks to cause 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