8.8

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

Modified
AliasesUBUNTU-CVE-2025-39864DEBIAN-CVE-2025-39864
Published 19-09-2025Last modified 05-08-2026

Vulnerability summary

CVE-2025-39864 is a high (CVSS 8.8) Use After Free vulnerability in debian debian_linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.8, adjacent network); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.24%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 54 · Related 34
DLA-4327-1DLA-4328-1DSA-6008-1DSA-6009-1LSN-0122-1OPENSUSE-SU-2025:20081-1

Timeline

  1. 19-09-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability 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

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

14%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.23% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: adjacent network, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu144 products
  • linuxAll versions (No fix recorded) | < 5.15.0-163.173 | < 6.8.0-106.106
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1097.104 | < 6.8.0-1050.53
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.153-1 | < 6.12.48-1 | < 6.16.6-1
  • debian_linuxEOL11.0
Linux2 products
  • linux≥ 3ab8227d3e7d1d2bf1829675d3197e3cb600e9f6, < a8bb681e879ca3c9f722aa08d3d7ae41c42a8807 | ≥ 3ab8227d3e7d1d2bf1829675d3197e3cb600e9f6, < a97a9791e455bb0cd5e7a38b5abcb05523d4e21c | ≥ 3ab8227d3e7d1d2bf1829675d3197e3cb600e9f6, < ff040562c10a540b8d851f7f4145fa112977f853 | ≥ 3ab8227d3e7d1d2bf1829675d3197e3cb600e9f6, < 6854476d9e1aeaaf05ebc98d610061c2075db07d | ≥ 3ab8227d3e7d1d2bf1829675d3197e3cb600e9f6, < b7d08929178c16398278613df07ad65cf63cce9d | ≥ 3ab8227d3e7d1d2bf1829675d3197e3cb600e9f6, < 5b7ae04969f822283a95c866967e42b4d75e0eef | ≥ 3ab8227d3e7d1d2bf1829675d3197e3cb600e9f6, < 912c4b66bef713a20775cfbf3b5e9bd71525c716 | ≥ 3ab8227d3e7d1d2bf1829675d3197e3cb600e9f6, < 26e84445f02ce6b2fe5f3e0e28ff7add77f35e08 | 5.4
  • 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

3 vendors · 148 products

References

36 links
Show all 36 references