What is CVE-2026-47328?

CVE-2026-47328 is a medium-severity vulnerability in Canonical Ubuntu Linux, classified under CWE-590. CVSS score: 6.1/10. Published 2026-05-28.

How severe is CVE-2026-47328?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Vulnerability in Canonical Ubuntu Linux

CVE-2026-47328

Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly attempt to free a pointer which was not previously kmalloc()d, while at the same time leaking allocated memory. The bug can be triggered by an unprivileged local user and can result in the corruption of slab metadata and could lead to resource exhaustion.

Published 2026-05-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H.

EPSS exploit prediction

EPSS: 0.001 (2.6th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 2.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

Canonical Ubuntu Linux — versions 6.8.0, 6.17.0, 7.0.0
Canonical Ubuntu Linux — versions 24.04, 25.10, 26.04

Weakness classification (CWE)

CWE-590

References

git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/noble/commit/ (Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-47328?: CVE-2026-47328 is a medium-severity vulnerability in Canonical Ubuntu Linux, classified under CWE-590. CVSS score: 6.1/10. Published 2026-05-28.
How severe is CVE-2026-47328?: Medium severity. CVSS v3 base score is 6.1 out of 10.