Vulnerability Description
A vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbitrary code on an affected device. This vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Clamav | Clamav | < 1.0.9 |
Related Weaknesses (CWE)
References
- https://blog.clamav.net/2025/06/clamav-143-and-109-security-patch.htmlVendor Advisory
- https://lists.debian.org/debian-lts-announce/2025/09/msg00006.html
FAQ
What is CVE-2025-20260?
CVE-2025-20260 is a vulnerability with a CVSS score of 9.8 (CRITICAL). A vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbi...
How severe is CVE-2025-20260?
CVE-2025-20260 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2025-20260?
Check the references section above for vendor advisories and patch information. Affected products include: Clamav Clamav.