ClamAV ClamBC < 0.103.0-rc - 'ClamBC' Executable Regular Expression Error (CVE-2020-37167) | HOL Guard CVE

High · CVSS 8.6CVE-2020-37167

ClamAV ClamBC < 0.103.0-rc - 'ClamBC' Executable Regular Expression Error

Answer in brief

CVE-2020-37167 records a High severity (CVSS 8.6) vulnerability in ClamAV ClamBC < 0.103.0-rc - 'ClamBC' Executable Regular Expression Error. The current sources do not mark it as known exploited. The current feed maps ClamAV/ClamBC (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Feb 12, 2026Updated Sep 30, 2026Source checked Sep 30, 2026First seen by HOL Sep 30, 2026Material review Sep 30, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.6
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 8.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps ClamAV/ClamBC (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
ClamAV/ClamBCgeneric	>=0 <0.103.0-rc	0.103.0-rc

Recommended response

Check inventory. Check lockfiles and deployed manifests for ClamAV/ClamBC.
Review the reported fix. Update ClamAV/ClamBC to 0.103.0-rc if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Feb 12, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 30, 2026

Sources and claim methodology

Upstream source description

ClamAV versions prior to 0.103.0-rc contain a vulnerability in function name processing through the ClamBC bytecode interpreter that allows attackers to manipulate bytecode function names. Attackers can exploit the weak input validation in function name encoding to potentially execute malicious bytecode or cause unexpected behavior in the ClamAV engine.

Quoted source text, attributed separately from HOL analysis.