CVE-2020-37167

Publication date 12 February 2026

Last updated 27 February 2026

Ubuntu priority

Cvss 3 Severity Score

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.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
clamav	25.10 questing	Not affected
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Fixed 0.103.2+dfsg-0ubuntu0.20.04.1
	18.04 LTS bionic	Fixed 0.103.2+dfsg-0ubuntu0.18.04.1
	16.04 LTS xenial	Fixed 0.103.2+dfsg-0ubuntu0.16.04.1
	14.04 LTS trusty	Fixed 0.103.2+dfsg-0ubuntu0.14.04.1+esm1

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Notes

leosilva

Building ClamAV requires rust compiler >= 1.61 releases as bionic, xenial and trusty are not covered by that version of rustc. ClamAV new versions can't build in these releases anymore.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
clamav	Upstream: cd2f297

Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H