Improper control of a resource through its lifetime in Linux kernel - CVE-2026-46248
Published: June 4, 2026
Vulnerability identifier: #VU133342
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-46248
CWE-ID: CWE-664
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 ath12k_mac_op_change_vif_links and ahvif->links_map when handling failed MLO connection preparation in non-AP STA mode. A local user can trigger authentication handling that reuses the same link id to cause a denial of service.
The issue occurs when an arvif is initialized but not created, leaving a stale link mapping that can trigger a WARN_ON.
How to mitigate CVE-2026-46248
Install security update from vendor's repository.