6.5

CVE-2020-21596: debian debian_linux Classic Buffer Overflow

CVSS: 6.5v3.1MediumModified
AliasesALPINE-CVE-2020-21596UBUNTU-CVE-2020-21596DEBIAN-CVE-2020-21596
Published 16-09-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-21596 is a medium (CVSS 6.5) Classic Buffer Overflow vulnerability in debian debian_linux. EPSS estimates a 1.49% chance of exploitation in the next 30 days, higher than 73.7% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
36/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
1.49%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 4 · Related 1
DLA-3280-1DSA-5346-1MGASA-2023-0093USN-6617-1

Timeline

  1. 16-09-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

1.49%

Chance of exploitation in the next 30 days

Percentile

74%

Versus all other CVEs

30-day change

0.00 pp

From 1.49% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.49%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Libde265

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Debian2 products
Alpine1 product
  • libde265< 1.0.11-r0
Struktur1 product
Ubuntu1 product
  • libde265< 1.0.2-2ubuntu0.16.04.1~esm1 | < 1.0.2-2ubuntu0.18.04.1~esm1 | < 1.0.4-1ubuntu0.1

4 vendors · 5 products

References

8 links