What is CVE-2021-38381?

CVE-2021-38381 is a medium-severity vulnerability in Live555, classified under Use After Free. CVSS score: 6.5/10. Published 2021-08-10.

How severe is CVE-2021-38381?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Use After Free in Live555

CVE-2021-38381

Live555 through 1.08 does not handle MPEG-1 or 2 files properly. Sending two successive RTSP SETUP commands for the same track causes a Use-After-Free and daemon crash.

Vulnerability class: Use-After-Free

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

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.012 (66.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Live555

Weakness classification (CWE)

CWE-416 — Use After Free

References

lists.live555.com/pipermail/live-devel/2021-August/021961.html (Exploit, Mailing List, Vendor Advisory)
www.live555.com/liveMedia/public/changelog.txt

Frequently asked questions

What is CVE-2021-38381?: CVE-2021-38381 is a medium-severity vulnerability in Live555, classified under Use After Free. CVSS score: 6.5/10. Published 2021-08-10.
How severe is CVE-2021-38381?: Medium severity. CVSS v3 base score is 6.5 out of 10.