What is CVE-2020-22617?

CVE-2020-22617 is a critical-severity vulnerability in Ardour, classified under Use After Free. CVSS score: 9.8/10. Published 2021-10-08.

How severe is CVE-2020-22617?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Use After Free in Ardour

CVE-2020-22617

Ardour v5.12 contains a use-after-free vulnerability in the component ardour/libs/pbd/xml++.cc when using xmlFreeDoc and xmlXPathFreeContext.

Vulnerability class: Use-After-Free

Published 2021-10-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (69.1th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Ardour — versions 5.12

Weakness classification (CWE)

CWE-416 — Use After Free

References

tracker.ardour.org/view.php (Vendor Advisory)
github.com/Ardour/ardour/commit/96daa4036a (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-22617?: CVE-2020-22617 is a critical-severity vulnerability in Ardour, classified under Use After Free. CVSS score: 9.8/10. Published 2021-10-08.
How severe is CVE-2020-22617?: Critical severity. CVSS v3 base score is 9.8 out of 10.