What is CVE-2026-47326?

CVE-2026-47326 is a medium-severity vulnerability in Canonical Ubuntu Linux, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 5.5/10. Published 2026-05-28.

How severe is CVE-2026-47326?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Canonical Ubuntu Linux

CVE-2026-47326

Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a memory leak in the handling of big responses to AppArmor notifications. The bug can be triggered by an unprivileged local user. The memory leak could lead to resource exhaustion.

EPSS: 0.000 (3.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Canonical Ubuntu Linux — versions 6.8.0, 6.17.0, 7.0.0

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

security@ubuntu.com (patch)

Frequently asked questions

What is CVE-2026-47326?: CVE-2026-47326 is a medium-severity vulnerability in Canonical Ubuntu Linux, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 5.5/10. Published 2026-05-28.
How severe is CVE-2026-47326?: Medium severity. CVSS v3 base score is 5.5 out of 10.