What is CVE-2026-47331?

CVE-2026-47331 is a high-severity vulnerability in Canonical Ubuntu Linux, classified under Use After Free. CVSS score: 7.8/10. Published 2026-05-28.

How severe is CVE-2026-47331?

High severity. CVSS v3 base score is 7.8 out of 10.

Use After Free in Canonical Ubuntu Linux

CVE-2026-47331

Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An unprivileged local user could trigger the race condition that can lead to a use-after-free (UAF) and, theoretically, arbitrary c…

Vulnerability class: Use-After-Free

EPSS: 0.000 (3.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Canonical Ubuntu Linux — versions 6.8.0

Weakness classification (CWE)

CWE-416 — Use After Free

References

security@ubuntu.com (patch)

Frequently asked questions

What is CVE-2026-47331?: CVE-2026-47331 is a high-severity vulnerability in Canonical Ubuntu Linux, classified under Use After Free. CVSS score: 7.8/10. Published 2026-05-28.
How severe is CVE-2026-47331?: High severity. CVSS v3 base score is 7.8 out of 10.