CVE-2025-20234: ClamAV UDF File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability
A vulnerability in Universal Disk Format (UDF) processing of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to a memory overread during UDF file scanning. An attacker could exploit this vulnerability by submitting a crafted file containing UDF content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the ClamAV scanning process, resulting in a DoS condition on the affected software. For a description of this vulnerability, see the .
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-20234?
CVE-2025-20234 is classified as a high severity vulnerability due to the potential for denial of service.
How do I fix CVE-2025-20234?
To mitigate CVE-2025-20234, update to the latest version of ClamAV as specified in security patches provided by Cisco.
Who is affected by CVE-2025-20234?
CVE-2025-20234 affects devices running Cisco ClamAV that utilize Universal Disk Format (UDF) processing.
What type of attack does CVE-2025-20234 enable?
CVE-2025-20234 allows unauthenticated remote attackers to cause a denial of service condition.
What causes CVE-2025-20234?
CVE-2025-20234 is caused by a memory overread during the scanning of UDF files in ClamAV.