CVE-2025-39864

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.

CVSS 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 14% of CVEs (scores of 2026-10-25)

CWE

CWE-416

Published

2025-09-19

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

Affected

• debian:debian_linux
• linux:linux_kernel

References

• https://git.kernel.org/stable/c/26e84445f02ce6b2fe5f3e0e28ff7add77f35e08
• https://git.kernel.org/stable/c/5b7ae04969f822283a95c866967e42b4d75e0eef
• https://git.kernel.org/stable/c/6854476d9e1aeaaf05ebc98d610061c2075db07d
• https://git.kernel.org/stable/c/912c4b66bef713a20775cfbf3b5e9bd71525c716
• https://git.kernel.org/stable/c/a8bb681e879ca3c9f722aa08d3d7ae41c42a8807

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