7.8

CVE-2021-47194: cfg80211: call cfg80211_stop_ap when switch from P2P_GO type

Modified
AliasesUBUNTU-CVE-2021-47194DEBIAN-CVE-2021-47194
Published 10-04-2024Last modified 05-08-2026

Vulnerability summary

CVE-2021-47194 is a high (CVSS 7.8) Improper Initialization vulnerability in linux. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 16.6% 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
0.25%
0%100%
Low · 0.00 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 12 · Related 12
SUSE-SU-2024:1641-1SUSE-SU-2024:1642-1SUSE-SU-2024:1644-1SUSE-SU-2024:1645-1SUSE-SU-2024:1647-1SUSE-SU-2024:1650-1

Timeline

  1. 10-04-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: cfg80211: call cfg80211_stop_ap when switch from P2P_GO type If the userspace tools switch from NL80211_IFTYPE_P2P_GO to NL80211_IFTYPE_ADHOC via send_msg(NL80211_CMD_SET_INTERFACE), it does not call the cleanup cfg80211_stop_ap(), this leads to the initialization of in-use data. For example, this path re-init the sdata->assigned_chanctx_list while it is still an element of assigned_vifs list, and makes that linked list corrupt.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

17%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.25% 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.

Ubuntu88 products
  • linuxAll versions (No fix recorded) | < 4.4.0-257.291 | < 4.15.0-167.175 | < 5.4.0-97.110
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1134.140 | < 4.4.0-1172.187 | < 4.15.0-1119.127 | < 5.4.0-1064.67
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ ac800140c20e7ae51117e71289065bedd4930fc2, < 8f06bb8c216bcd172394f61e557727e691b4cb24 | ≥ ac800140c20e7ae51117e71289065bedd4930fc2, < 0738cdb636c21ab552eaecf905efa4a6070e3ebc | ≥ ac800140c20e7ae51117e71289065bedd4930fc2, < 4e458abbb4a523f1413bfe15c079cf4e24c15b21 | ≥ ac800140c20e7ae51117e71289065bedd4930fc2, < b8a045e2a9b234cfbc06cf36923886164358ddec | ≥ ac800140c20e7ae51117e71289065bedd4930fc2, < 52affc201fc22a1ab9a59ef0ed641a9adfcb8d13 | ≥ ac800140c20e7ae51117e71289065bedd4930fc2, < 7b97b5776daa0b39dbdadfea176f9cc0646d4a66 | ≥ ac800140c20e7ae51117e71289065bedd4930fc2, < 5a9b671c8d74a3e1b999e7a0c7f366079bcc93dd | ≥ ac800140c20e7ae51117e71289065bedd4930fc2, < 563fbefed46ae4c1f70cffb8eb54c02df480b2c2 | 3.6
  • linux_kernel≥ 3.6.0, < 4.4.293 | ≥ 4.5.0, < 4.9.291 | ≥ 4.10.0, < 4.14.256 | ≥ 4.15.0, < 4.19.218 | ≥ 4.20.0, < 5.4.162 | ≥ 5.5.0, < 5.10.82 | ≥ 5.11.0, < 5.15.5
Debian1 product
  • linux< 5.15.5-1

3 vendors · 91 products

References

13 links
Show all 13 references