What is CVE-2026-6386?

CVE-2026-6386 is a medium-severity vulnerability in Freebsd, classified under Improper Privilege Management. CVSS score: 6.2/10. Published 2026-04-22.

How severe is CVE-2026-6386?

Medium severity. CVSS v3 base score is 6.2 out of 10.

Privilege escalation in Freebsd

CVE-2026-6386

In order to apply a particular protection key to an address range, the kernel must update the corresponding page table entries. The subroutine which handled this failed to take into account the presence of 1GB largepage mappings created u…

Vulnerability class: Privilege Escalation

EPSS: 0.000 (1.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Freebsd — versions 14.3, 13.5, 15.0

Weakness classification (CWE)

CWE-269 — Improper Privilege Management
CWE-732 — Incorrect Permission Assignment for Critical Resource

References

secteam@freebsd.org (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-6386?: CVE-2026-6386 is a medium-severity vulnerability in Freebsd, classified under Improper Privilege Management. CVSS score: 6.2/10. Published 2026-04-22.
How severe is CVE-2026-6386?: Medium severity. CVSS v3 base score is 6.2 out of 10.