What is CVE-2026-3351?

CVE-2026-3351 is a medium-severity vulnerability in Linux Linux_kernel, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-03-03.

How severe is CVE-2026-3351?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Linux Linux_kernel

CVE-2026-3351

Improper authorization in the API endpoint GET /1.0/certificates in Canonical LXD 6.6 on Linux allows an authenticated, restricted user to enumerate all certificate fingerprints trusted by the lxd server.

Vulnerability class: Broken Access Control

EPSS: 0.001 (3.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Linux Linux_kernel
Canonical Lxd — versions 6.6

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

security@ubuntu.com (Exploit, vendor-advisory, Mitigation, vdb-entry, Vendor Advisory)
security@ubuntu.com (issue-tracking, Patch, patch, Issue Tracking)
security@ubuntu.com (Patch, patch)

Frequently asked questions

What is CVE-2026-3351?: CVE-2026-3351 is a medium-severity vulnerability in Linux Linux_kernel, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-03-03.
How severe is CVE-2026-3351?: Medium severity. CVSS v3 base score is 4.3 out of 10.