Double free in Linux kernel - CVE-2026-64568
Published: August 6, 2026
Vulnerability identifier: #VU141040
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2026-64568
CWE-ID: CWE-415
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to double free in ieee80211_set_unsol_bcast_probe_resp() when handling updates to unsolicited broadcast probe response templates after an allocation failure. A local user can trigger a later update or AP teardown to cause a denial of service.
The issue occurs because the pointer can still reference an object already queued for RCU freeing after kzalloc() fails.
Affected software
Linux kernel
How to mitigate CVE-2026-64568
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3