CVE-2021-20317
high
CVSS v3
—
CVSS v4 NEW
—
VIR risk
8.0
Description
A flaw was found in the Linux kernel. A corrupted timer tree caused the task wakeup to be missing in the timerqueue_add function in lib/timerqueue.c. This flaw allows a local attacker with special user privileges to cause a denial of service, slowing and eventually stopping the system while running OSP.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 5.4.6-1 |
| sid | Fixed | 5.4.6-1 |
| forky | Fixed | 5.4.6-1 |
| bullseye | Fixed | 5.4.6-1 |
| bookworm | Fixed | 5.4.6-1 |
Red Hat Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| 8 | Fixed | — |
Rocky Linux Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| 8 | Fixed | — |
References
- https://www.suse.com/security/cve/CVE-2021-20317.html
- https://errata.rockylinux.org/RLSA-2021:4647
- https://errata.rockylinux.org/RLSA-2021:4646
- https://security-tracker.debian.org/tracker/CVE-2021-20317
- https://errata.almalinux.org/8/ALSA-2021-4647.html
- https://access.redhat.com/errata/RHSA-2021:4646
- https://access.redhat.com/errata/RHSA-2021:4647
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.