Heap-based buffer overflow in ClamAV - CVE-2025-20128
Published: January 22, 2025 / Updated: June 18, 2025
Vulnerability identifier: #VU103240
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-20128
CWE-ID: CWE-122
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 perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error when decrypting OLE2 file format. A remote attacker can pass a specially crafted file to the application, trigger a heap-based buffer overflow and perform a denial of service (DoS) attack.
How to mitigate CVE-2025-20128
Install update from vendor's website.