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.

Metrics

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation poc

Automatable yes

Technical Impact total

Affected Vendors & Products

Vendors Products
Clamav
  • Clamav

No data.

No data.

References
Link Providers
https://github.com/Cisco-Talos/clamav/commit/cd2f2975b93277de7f74464d48adb378375a305f cve-icon cve-icon
https://www.clamav.net/ cve-icon cve-icon
https://www.exploit-db.com/exploits/47687 cve-icon cve-icon
https://www.vulncheck.com/advisories/clamav-clambc-clambc-executable-regular-expression-error cve-icon cve-icon
History

Fri, 27 Feb 2026 21:45:00 +0000

Type Values Removed Values Added
Description ClamAV versions prior to 0.102.0, fixed in 0.103.0-rc, ClamBC bytecode interpreter contains a vulnerability in function name processing 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. 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.
Title ClamAV ClamBC <= 0.102.0 - 'ClamBC' Executable Regular Expression Error ClamAV ClamBC < 0.103.0-rc - 'ClamBC' Executable Regular Expression Error

Fri, 27 Feb 2026 20:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-94

Fri, 27 Feb 2026 20:15:00 +0000

Type Values Removed Values Added
Description ClamAV ClamBC bytecode interpreter contains a vulnerability in function name processing 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. ClamAV versions prior to 0.102.0, fixed in 0.103.0-rc, ClamBC bytecode interpreter contains a vulnerability in function name processing 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.

Fri, 27 Feb 2026 20:00:00 +0000

Type Values Removed Values Added
References

Fri, 27 Feb 2026 19:45:00 +0000

Type Values Removed Values Added
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

 cvssV3_1

{'score': 8.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Fri, 27 Feb 2026 17:30:00 +0000

Type Values Removed Values Added
References

Fri, 27 Feb 2026 16:30:00 +0000

Type Values Removed Values Added
References

Fri, 13 Feb 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Clamav
Clamav clamav
Vendors & Products Clamav
Clamav clamav

Fri, 13 Feb 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Thu, 12 Feb 2026 23:15:00 +0000

Type Values Removed Values Added
Description ClamAV ClamBC bytecode interpreter contains a vulnerability in function name processing 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.
Title ClamAV ClamBC <= 0.102.0 - 'ClamBC' Executable Regular Expression Error
Weaknesses CWE-94
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.6, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-02-12T22:48:50.169Z

Updated: 2026-02-27T21:23:18.537Z

Reserved: 2026-02-06T12:30:23.086Z

Link: CVE-2020-37167

cve-icon Vulnrichment

Updated: 2026-02-13T17:08:41.880Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-02-12T23:16:08.887

Modified: 2026-02-27T22:16:20.217

Link: CVE-2020-37167

cve-icon Redhat

No data.