What is CVE-2021-36144?

CVE-2021-36144 is a high-severity vulnerability in Linux Acrn, classified under Use After Free. CVSS score: 7.5/10. Published 2021-07-02.

How severe is CVE-2021-36144?

High severity. CVSS v3 base score is 7.5 out of 10.

Use After Free in Linux Acrn

CVE-2021-36144

The polling timer handler in ACRN before 2.5 has a use-after-free for a freed virtio device, related to devicemodel/hw/pci/virtio/*.c.

Vulnerability class: Use-After-Free

Published 2021-07-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.010 (60.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Linux Acrn

Weakness classification (CWE)

CWE-416 — Use After Free

References

github.com/projectacrn/acrn-hypervisor/pull/6268/commits/dd88504804e186029f845a… (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-36144?: CVE-2021-36144 is a high-severity vulnerability in Linux Acrn, classified under Use After Free. CVSS score: 7.5/10. Published 2021-07-02.
How severe is CVE-2021-36144?: High severity. CVSS v3 base score is 7.5 out of 10.