Bug 2496085 (CVE-2026-20213)

Summary: CVE-2026-20213 ClamAV: ClamAV: Denial of Service via crafted Portable Executable (PE) files
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in ClamAV. An unauthenticated, remote attacker could exploit this vulnerability by submitting a specially crafted file containing Portable Executable (PE) content for scanning. This is due to improper boundary checks during the scanning process, which may lead to an out-of-bounds buffer write and memory corruption. A successful exploit could result in a Denial of Service (DoS) condition, causing the ClamAV scanning process to terminate.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2496895, 2496896    
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Description OSIDB Bzimport 2026-07-01 18:01:32 UTC 
A vulnerability in the PE file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition, or possibly other expanded impacts, resulting from memory corruption on an affected device.

This vulnerability is due to improper boundary checks for content in PE files during scanning, which may result in an out-of-bounds buffer write. An attacker could exploit this vulnerability by submitting a crafted file that contains PE content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software.