CVE-2021-47194
What it is
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.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of data exposure, data tampering, service disruption.
- Exploit odds
- 0.3% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.3% in the next 30 days (EPSS).
- Severity: 7.8 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.3% · EPSS, next 30 days
- Weakness
- CWE-665
- Record status
- Modified
Affected
- Linux Kernel < 4.4.293
- Linux Kernel < 4.9.291
- Linux Kernel < 4.14.256
- Linux Kernel < 4.19.218
- Linux Kernel < 5.4.162
- Linux Kernel < 5.10.82
- Linux Kernel < 5.15.5
Attack profile CVSS 3.1 · 7.8
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2021-47194.md and follow it. Check whether this project is affected by CVE-2021-47194. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://git.kernel.org/stable/c/0738cdb636c21ab552eaecf905efa4a6070e3ebc
- https://git.kernel.org/stable/c/4e458abbb4a523f1413bfe15c079cf4e24c15b21
- https://git.kernel.org/stable/c/52affc201fc22a1ab9a59ef0ed641a9adfcb8d13
- https://git.kernel.org/stable/c/563fbefed46ae4c1f70cffb8eb54c02df480b2c2
- https://git.kernel.org/stable/c/5a9b671c8d74a3e1b999e7a0c7f366079bcc93dd
- https://git.kernel.org/stable/c/7b97b5776daa0b39dbdadfea176f9cc0646d4a66
- https://git.kernel.org/stable/c/8f06bb8c216bcd172394f61e557727e691b4cb24
- https://git.kernel.org/stable/c/b8a045e2a9b234cfbc06cf36923886164358ddec
- https://git.kernel.org/stable/c/0738cdb636c21ab552eaecf905efa4a6070e3ebc
- https://git.kernel.org/stable/c/4e458abbb4a523f1413bfe15c079cf4e24c15b21
References
- https://git.kernel.org/stable/c/0738cdb636c21ab552eaecf905efa4a6070e3ebc
- https://git.kernel.org/stable/c/4e458abbb4a523f1413bfe15c079cf4e24c15b21
- https://git.kernel.org/stable/c/52affc201fc22a1ab9a59ef0ed641a9adfcb8d13
- https://git.kernel.org/stable/c/563fbefed46ae4c1f70cffb8eb54c02df480b2c2
- https://git.kernel.org/stable/c/5a9b671c8d74a3e1b999e7a0c7f366079bcc93dd
- https://git.kernel.org/stable/c/7b97b5776daa0b39dbdadfea176f9cc0646d4a66
- https://git.kernel.org/stable/c/8f06bb8c216bcd172394f61e557727e691b4cb24
- https://git.kernel.org/stable/c/b8a045e2a9b234cfbc06cf36923886164358ddec
- https://git.kernel.org/stable/c/0738cdb636c21ab552eaecf905efa4a6070e3ebc
- https://git.kernel.org/stable/c/4e458abbb4a523f1413bfe15c079cf4e24c15b21
- https://git.kernel.org/stable/c/52affc201fc22a1ab9a59ef0ed641a9adfcb8d13
- https://git.kernel.org/stable/c/563fbefed46ae4c1f70cffb8eb54c02df480b2c2
- https://git.kernel.org/stable/c/5a9b671c8d74a3e1b999e7a0c7f366079bcc93dd
- https://git.kernel.org/stable/c/7b97b5776daa0b39dbdadfea176f9cc0646d4a66
- https://git.kernel.org/stable/c/8f06bb8c216bcd172394f61e557727e691b4cb24
- https://git.kernel.org/stable/c/b8a045e2a9b234cfbc06cf36923886164358ddec