Bug 2373722 (CVE-2025-20234)

Summary: CVE-2025-20234 clamav: ClamAV Information Disclosure Vulnerability
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, reine.persson, vkumar
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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A vulnerability has been discovered in ClamAV related to its processing of Universal Disk Format (UDF) files. This flaw involves a memory over-read that can lead to a crash of the ClamAV scanning process. Given that ClamAV is frequently used to scan untrusted input received over a network (for example, email attachments and web downloads), this vulnerability can be considered exploitable via a remote attack vector, potentially leading to a denial of service against the scanning service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2373732, 2373735, 2373739, 2373743, 2373730, 2373731, 2373733, 2373734, 2373736, 2373737, 2373738, 2373740, 2373741, 2373742    
Bug Blocks:    

Description OSIDB Bzimport 2025-06-18 17:01:25 UTC 
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 .