7.8

CVE-2025-21979: wifi: cfg80211: cancel wiphy_work before freeing wiphy

Analyzed
AliasesUBUNTU-CVE-2025-21979DEBIAN-CVE-2025-21979
Published 01-04-2025Last modified 05-08-2026

Vulnerability summary

CVE-2025-21979 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 11% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.21%
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 34 · Related 28
DLA-4193-1DSA-5900-1MGASA-2025-0142MGASA-2025-0146RHSA-2025:9079RHSA-2025:9080

Timeline

  1. 01-04-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: cancel wiphy_work before freeing wiphy A wiphy_work can be queued from the moment the wiphy is allocated and initialized (i.e. wiphy_new_nm). When a wiphy_work is queued, the rdev::wiphy_work is getting queued. If wiphy_free is called before the rdev::wiphy_work had a chance to run, the wiphy memory will be freed, and then when it eventally gets to run it'll use invalid memory. Fix this by canceling the work before freeing the wiphy.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.20% 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: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu110 products
  • linux< 6.8.0-84.84
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1039.41
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ ddb1bfbf4ab5c753954d0cd728253b642934a9f2, < 8930a3e1568cf534f86c8ed2def817c6d0528fc1 | ≥ 3fcc6d7d5f40dad56dee7bde787b7e23edd4b93c, < 0272d4af7f92997541d8bbf4c51918b93ded6ee2 | ≥ a3ee4dc84c4e9d14cb34dad095fd678127aca5b6, < 75d262ad3c36d52852d764588fcd887f0fcd9138 | ≥ a3ee4dc84c4e9d14cb34dad095fd678127aca5b6, < a5158d67bff06cb6fea31be39aeb319fd908ed8e | ≥ a3ee4dc84c4e9d14cb34dad095fd678127aca5b6, < dea22de162058216a90f2706f0d0b36f0ff309fd | ≥ a3ee4dc84c4e9d14cb34dad095fd678127aca5b6, < 72d520476a2fab6f3489e8388ab524985d6c4b90 | ≥ 6.1.57, < 6.1.132 | 6.5
  • linux_kernel≥ 6.1.57, < 6.1.132 | ≥ 6.5, < 6.6.84 | ≥ 6.7, < 6.12.20 | ≥ 6.13, < 6.13.8 | 6.14:rc1 | 6.14:rc2 | 6.14:rc3 | 6.14:rc4 | 6.14:rc5 | 6.14:rc6
Debian1 product
  • linux< 6.1.133-1 | < 6.12.20-1

3 vendors · 113 products

References

29 links
Show all 29 references