CVE-2021-4154
Description
A use-after-free flaw was found in cgroup1_parse_param in kernel/cgroup/cgroup-v1.c in the Linux kernel's cgroup v1 parser. A local attacker with a user privilege could cause a privilege escalation by exploiting the fsconfig syscall parameter leading to a container breakout and a denial of service on the system.
Predictions
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 | 5.14.6-1 |
| sid | Fixed | 5.14.6-1 |
| forky | Fixed | 5.14.6-1 |
| bullseye | Fixed | 5.10.70-1 |
| bookworm | Fixed | 5.14.6-1 |
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-2021-4154.html
- https://errata.rockylinux.org/RLSA-2022:0825
- https://errata.rockylinux.org/RLSA-2022:0819
- https://security-tracker.debian.org/tracker/CVE-2021-4154
- https://errata.almalinux.org/8/ALSA-2022-0825.html
- https://access.redhat.com/errata/RHSA-2022:0819
- https://access.redhat.com/errata/RHSA-2022:0825
- https://access.redhat.com/errata/RHSA-2022:0849
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.