Use of Uninitialized Resource Affecting md4c package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.7% (49th percentile)

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  • Snyk IDSNYK-UBUNTU2004-MD4C-1278738
  • published16 Jan 2026
  • disclosed29 Apr 2021

Introduced: 29 Apr 2021

CVE-2021-30027  (opens in a new tab)
CWE-908  (opens in a new tab)

How to fix?

There is no fixed version for Ubuntu:20.04 md4c.

NVD Description

Note: Versions mentioned in the description apply only to the upstream md4c package and not the md4c package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

md_analyze_line in md4c.c in md4c 0.4.7 allows attackers to trigger use of uninitialized memory, and cause a denial of service via a malformed Markdown document.

CVSS Base Scores

version 3.1