CVE-2025-39864 – wifi: cfg80211: fix use-after-free in cmp_bss()

CVE ID : CVE-2025-39864

Published : Sept. 19, 2025, 4:15 p.m. | 48 minutes ago

Description : In the Linux kernel, the following vulnerability has been resolved:

wifi: cfg80211: fix use-after-free in cmp_bss()

Following bss_free() quirk introduced in commit 776b3580178f
(“cfg80211: track hidden SSID networks properly”), adjust
cfg80211_update_known_bss() to free the last beacon frame
elements only if they’re not shared via the corresponding
‘hidden_beacon_bss’ pointer.

Severity: 0.0 | NA

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