CVE-2021-28951
moderate-risk
Published 2021-03-20
An issue was discovered in fs/io_uring.c in the Linux kernel through 5.11.8. It allows attackers to cause a denial of service (deadlock) because exit may be waiting to park a SQPOLL thread, but concurrently that SQPOLL thread is waiting for a signal to start, aka CID-3ebba796fa25.
Do I need to act?
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0.05% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10
Medium
LOCAL
/ LOW complexity
Affected Products (9)
Affected Vendors
References (10)
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210430-0003/
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210430-0003/
33
/ 100
moderate-risk
Severity
18/34 · Moderate
Exploitability
0/34 · Minimal
Exposure
15/34 · Moderate