CVE-2021-43816
unknown
CVSS v3
—
CVSS v4 NEW
—
VIR risk
—
Description
Unprivileged pod using `hostPath` can side-step active LSM when it is SELinux in github.com/containerd/containerd
Predictions
Exploit likelihood
30%
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 | 1.5.9~ds1-1 |
| sid | Fixed | 1.5.9~ds1-1 |
| forky | Fixed | 1.5.9~ds1-1 |
| bullseye | Fixed | 0 |
| bookworm | Fixed | 1.5.9~ds1-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Go | github.com/containerd/containerd | >=1.5.0,<1.5.9 | 1.5.9 |
References
- https://security-tracker.debian.org/tracker/CVE-2021-43816
- https://www.suse.com/security/cve/CVE-2021-43816.html
- https://github.com/containerd/containerd/security/advisories/GHSA-mvff-h3cj-wj9c
- https://nvd.nist.gov/vuln/detail/CVE-2021-43816
- https://github.com/containerd/containerd/issues/6194
- https://github.com/containerd/containerd/commit/a731039238c62be081eb8c31525b988415745eea
- https://github.com/dweomer/containerd/commit/f7f08f0e34fb97392b0d382e58916d6865100299
- https://github.com/containerd/containerd
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GD5GH7NMK5VJMA2Y5CYB5O5GTPYMWMLX
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MPDIZMI7ZPERSZE2XO265UCK5IWM7CID
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.