Skip to main content
No exploitation reportedFix available

CVE-2020-21596

No exploitation reported by the sources we read.

  • Published2021-09-16
  • WeaknessCWE-120

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

libde265 v1.0.4 contains a global buffer overflow in the decode_CABAC_bit function, which can be exploited via a crafted a file.

Timeline

dates in UTC
  1. 2021-09-1622:15CVE publishedNVD

Versions per branch

NVD
Debian debian linux
BranchAffectedFixed in
10.0= 10.0no fix published
11.0= 11.0no fix published
Struktur libde265
BranchAffectedFixed in
1.0= 1.0.4no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • libde265Ubuntu:Pro:18.04:LTSall versions · fixed in 1.0.2-2ubuntu0.18.04.1~esm1
  • libde265Ubuntu:Pro:16.04:LTSall versions · fixed in 1.0.2-2ubuntu0.16.04.1~esm1
  • libde265Ubuntu:20.04:LTSall versions · fixed in 1.0.4-1ubuntu0.1
  • libde265Mageia:8all versions · fixed in 1.0.11-1.mga8.tainted
  • libde265Mageia:8all versions · fixed in 1.0.11-1.mga8
  • libde265Debian:14all versions · fixed in 1.0.11-1
  • libde265Debian:13all versions · fixed in 1.0.11-1
  • libde265Debian:12all versions · fixed in 1.0.11-1

14 more package ranges on OSV.dev

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Published
2021-09-16
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-7jfj-gx4w-4x33

Frequently asked questions

What is CVE-2020-21596?

libde265 v1.0.4 contains a global buffer overflow in the decode_CABAC_bit function, which can be exploited via a crafted a file.

Is CVE-2020-21596 actively exploited?

Active exploitation of CVE-2020-21596 has not been confirmed. Its EPSS score was 1.5% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-21596?

CVE-2020-21596 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Running libde265? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, November 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record