Vulnerability Details : CVE-2021-47091
In the Linux kernel, the following vulnerability has been resolved:
mac80211: fix locking in ieee80211_start_ap error path
We need to hold the local->mtx to release the channel context,
as even encoded by the lockdep_assert_held() there. Fix it.
Products affected by CVE-2021-47091
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.16:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.16:rc6:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-47091
0.01%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-47091
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST | 2025-02-03 |
CWE ids for CVE-2021-47091
-
The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-47091
-
https://git.kernel.org/stable/c/c1d1ec4db5f7264cfc21993e59e8f2dcecf4b44f
mac80211: fix locking in ieee80211_start_ap error path - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/ac61b9c6c0549aaeb98194cf429d93c41bfe5f79
mac80211: fix locking in ieee80211_start_ap error path - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/87a270625a89fc841f1a7e21aae6176543d8385c
mac80211: fix locking in ieee80211_start_ap error path - kernel/git/stable/linux.git - Linux kernel stable treePatch
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