Release of invalid pointer or reference in ClamAV - CVE-2026-20217
Published: July 1, 2026
Vulnerability identifier: #VU136659
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-20217
CWE-ID: CWE-763
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: ClamAV
Affected software:
ClamAV
ClamAV
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to invalid pointer free in the PESpin unpacker cleanup path when scanning a crafted PE file. A remote attacker can provide a specially crafted file to cause a denial of service.
How to mitigate CVE-2026-20217
Install security update from vendor's website.