CVE-2025-39864

Advisory lineage Upstream: 0 Downstream: 54
Modified
Published: 19 Sept 2025, 15:26
Last modified:12 May 2026, 12:07

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

19 Sept 2025, 15:26
Published
Vulnerability first disclosed
12 May 2026, 12:07
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 5%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • debian•debian_linux

    11.0

  • linux•linux

    ≥ 3ab8227d3e7d1d2bf1829675d3197e3cb600e9f6, < a8bb681e879ca3c9f722aa08d3d7ae41c42a8807 | ≥ 3ab8227d3e7d1d2bf1829675d3197e3cb600e9f6, < a97a9791e455bb0cd5e7a38b5abcb05523d4e21c | ≥ 3ab8227d3e7d1d2bf1829675d3197e3cb600e9f6, < ff040562c10a540b8d851f7f4145fa112977f853 | ≥ 3ab8227d3e7d1d2bf1829675d3197e3cb600e9f6, < 6854476d9e1aeaaf05ebc98d610061c2075db07d | ≥ 3ab8227d3e7d1d2bf1829675d3197e3cb600e9f6, < b7d08929178c16398278613df07ad65cf63cce9d | ≥ 3ab8227d3e7d1d2bf1829675d3197e3cb600e9f6, < 5b7ae04969f822283a95c866967e42b4d75e0eef | ≥ 3ab8227d3e7d1d2bf1829675d3197e3cb600e9f6, < 912c4b66bef713a20775cfbf3b5e9bd71525c716 | ≥ 3ab8227d3e7d1d2bf1829675d3197e3cb600e9f6, < 26e84445f02ce6b2fe5f3e0e28ff7add77f35e08 | 5.4

  • linux•linux_kernel

    ≥ 5.4, < 5.4.299 | ≥ 5.5, < 5.10.243 | ≥ 5.11, < 5.15.192 | ≥ 5.16, < 6.1.151 | ≥ 6.2, < 6.6.105 | ≥ 6.7, < 6.12.46 | ≥ 6.13, < 6.16.6 | 6.17:rc1 | 6.17:rc2 | 6.17:rc3 | 6.17:rc4

References (12)