What is CVE-2024-6156?

CVE-2024-6156 is a low-severity vulnerability in Canonical Ltd. Lxd, classified under Improper Certificate Validation. CVSS score: 3.8/10. Published 2024-12-06.

How severe is CVE-2024-6156?

Low severity. CVSS v3 base score is 3.8 out of 10.

Vulnerability in Canonical Ltd. Lxd

CVE-2024-6156

Mark Laing discovered that LXD's PKI mode, until version 5.21.2, could be bypassed if the client's certificate was present in the trust store.

Vulnerability class: Improper Certificate Validation

Published 2024-12-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.8 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (4.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Canonical Ltd. Lxd — versions 4.0
Canonical Lxd

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

github.com/canonical/lxd/security/advisories/GHSA-4c49-9fpc-hc3v (issue-tracking, Exploit, Vendor Advisory)
www.cve.org/CVERecord (issue-tracking, Third Party Advisory)

Frequently asked questions

What is CVE-2024-6156?: CVE-2024-6156 is a low-severity vulnerability in Canonical Ltd. Lxd, classified under Improper Certificate Validation. CVSS score: 3.8/10. Published 2024-12-06.
How severe is CVE-2024-6156?: Low severity. CVSS v3 base score is 3.8 out of 10.