SB20260727245 - NULL pointer dereference in Linux kernel mt76 mt7925 driver

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2026-64325)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 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

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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/351dd7d2c80d23e56dcce6faa4e62bea5b0877c7
• https://git.kernel.org/stable/c/77e7b127472a191e086e1e0b1b051703f33b1801