CVE-2021-28951
medium
CVSS v3
—
CVSS v2
—
VIR risk
5.5
Description
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.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-28951
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-28951.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 5.10.26-1 | |
| sles | affected | | |
| debian | bookworm | fixed | 5.10.26-1 |
| debian | bullseye | fixed | 5.10.26-1 |
| debian | forky | fixed | 5.10.26-1 |
| debian | sid | fixed | 5.10.26-1 |
| debian | trixie | fixed | 5.10.26-1 |
References
Verify integrity in audit chain (admin only). AS-IS.