What is CVE-2021-36411?

CVE-2021-36411 is a medium-severity vulnerability in Struktur Libde265, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2022-01-10.

How severe is CVE-2021-36411?

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

Out-of-bounds Read in Struktur Libde265

CVE-2021-36411

An issue has been found in libde265 v1.0.8 due to incorrect access control. A SEGV caused by a READ memory access in function derive_boundaryStrength of deblock.cc has occurred. The vulnerability causes a segmentation fault and application crash, which leads to remote denial of service.

Vulnerability class: Buffer Overflow

Published 2022-01-10 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.012 (65.9th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 65.9% 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

Struktur Libde265 — versions 1.0.8
Debian Linux — versions 10.0, 11.0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

github.com/strukturag/libde265/issues/302 (Exploit, Issue Tracking)
lists.debian.org/debian-lts-announce/2022/12/msg00027.html (mailing-list, Mailing List, Issue Tracking)
www.debian.org/security/2023/dsa-5346 (vendor-advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-36411?: CVE-2021-36411 is a medium-severity vulnerability in Struktur Libde265, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2022-01-10.
How severe is CVE-2021-36411?: Medium severity. CVSS v3 base score is 5.5 out of 10.