NULL pointer dereference in Linux kernel - CVE-2026-64325
Published: July 27, 2026
Vulnerability identifier: #VU139647
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-64325
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in mt7921_channel_switch_rx_beacon() and mt7925_channel_switch_rx_beacon() when processing a channel-switch announcement beacon after the channel context has been torn down. A remote attacker can send a channel-switch announcement beacon to trigger a kernel crash and cause a denial of service.
Exploitation requires a race condition where the queued work executes after the station disconnects or the channel context is otherwise removed.
How to mitigate CVE-2026-64325
Install security update from vendor's repository.