6.5

CVE-2020-21594: struktur libde265 Out-of-bounds Write

CVSS: 6.5v3.1MediumModified
AliasesALPINE-CVE-2020-21594UBUNTU-CVE-2020-21594DEBIAN-CVE-2020-21594
Published 16-09-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-21594 is a medium (CVSS 6.5) Out-of-bounds Write vulnerability in struktur libde265. EPSS estimates a 1.22% chance of exploitation in the next 30 days, higher than 68.2% 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
1.22%
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 3 · Related 1
DSA-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 heap buffer overflow in the put_epel_hv_fallback function, which can be exploited via a crafted a file.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

1.22%

Chance of exploitation in the next 30 days

Percentile

68%

Versus all other CVEs

30-day change

0.00 pp

From 1.22% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.22%

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

Alpine1 product
  • libde265< 1.0.11-r0
Debian1 product
  • libde265< 1.0.3-1
Struktur1 product
Ubuntu1 product
  • libde265< 1.0.2-2ubuntu0.16.04.1~esm1 | < 1.0.2-2ubuntu0.18.04.1~esm1

4 vendors · 4 products

References

7 links