Improper Initialization in Linux kernel - CVE-2026-64522
Published: July 27, 2026
Vulnerability identifier: #VU139412
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-2026-64522
CWE-ID: CWE-665
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 state management in mlx5e_xfrm_add_state() when handling acquire-flow temporary security associations for IPsec offload. A local user can trigger creation of a temporary acquire SA to cause a denial of service.
The issue occurs because the acquire-SA path can reach mode-unblock logic without a matching mode-block operation.
How to mitigate CVE-2026-64522
Install security update from vendor's repository.