Improper resource shutdown or release in Linux kernel - CVE-2026-53229
Published: June 26, 2026
Vulnerability identifier: #VU135554
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-53229
CWE-ID: CWE-404
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper resource shutdown or release in mlx5e_xmit_xdp_buff() in the mlx5 XDP transmit path when handling XDP_TX transmission failures in the XSK branch. A local user can trigger an XDP_TX transmit failure to cause a denial of service.
The issue occurs when sq->xmit_xdp_frame() returns false, such as when the XDPSQ is full, leaving DMA mappings and xdp_frame objects unreleased.
How to mitigate CVE-2026-53229
Install security update from vendor's repository.