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Vulnerability record · public intelligence
CVE-2021-20204
CRITICAL

CVE-2021-20204

Published May 6, 2021 · Updated Nov 3, 2026

Severity · CVSSCRITICAL · Not scored
Known exploitationNot listed
EPSS / likelihood2.10%
QFinch risk scoreNot available

Original summary

Normalized public record · Updated Nov 3, 2026

A heap memory corruption problem (use after free) can be triggered in libgetdata v0.10.0 when processing maliciously crafted dirfile databases. This degrades the confidentiality, integrity and availability of third-party software that uses libgetdata as a library. This vulnerability may lead to arbitrary code execution or privilege escalation depending on input/skills of attacker.

Publisher and source text is retained separately from QFinch interpretation.

QFinch assessment

A heap memory corruption problem (use after free) can be triggered in libgetdata v0.10.0 when processing maliciously crafted dirfile databases. This degrades the confidentiality, integrity and availability of third-party software that uses libgetdata as a library. This vulnerability may lead to arbitrary code execution or privilege escalation depending on input/skills of attacker.

Evidence: public source records

Affected products

Affected scope reported by the available public evidence
Affected package, product or rangeFix status
Consult the referenced vendor advisory for affected versions.Consult source advisory

Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.

Remediation

Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.

  1. Confirm the affected product and reachable code path exist in your environment.
  2. Apply the vendor-supported patch or mitigation from the primary advisory.
  3. Rescan the exact deployed revision and retain verification evidence.
Review primary references

Evidence coverage

FIRST-EPSSCVE-LIST-V5
SSVC priority
MEDIUM
Confidence
Not available
Aliases
None reported

Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.

Sources and record history

  1. bugzilla.redhat.com ↗
  2. [debian-lts-announce] 20210513 [SECURITY] [DLA 2660-1] libgetdata security update ↗
  3. FEDORA-2021-e2b64c614b ↗
  4. FEDORA-2021-3b8bb26909 ↗
  5. FEDORA-2021-197545a753 ↗

Record history

Published May 6, 2021 · Last refreshed Nov 3, 2026

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