CVE-2025-20260

Name
CVE-2025-20260
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.
NVD Severity
high
Other trackers
Mailing lists
Exploits
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
psirt@cisco.com https://blog.clamav.net/2025/06/clamav-143-and-109-security-patch.html
af854a3a-2127-422b-91ae-364da2661108 https://lists.debian.org/debian-lts-announce/2025/09/msg00006.html

Match rules

CPE URI Source package Min version Max version
clamav == 1.4.2 == 1.4.2
clamav == 1.4.1 == 1.4.1
clamav == 1.4.0 == 1.4.0
clamav == 1.3.2 == 1.3.2
clamav == 1.3.1 == 1.3.1
clamav == 1.3.0 == 1.3.0
clamav == 1.2.3 == 1.2.3
clamav == 1.2.2 == 1.2.2
clamav == 1.2.1 == 1.2.1
clamav == 1.2.0 == 1.2.0

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
clamav edge-community 1.4.3-r0 Carlo Landmeter <clandmeter@alpinelinux.org> fixed
clamav edge-community 1.4.2-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
clamav edge-community 1.4.1-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
clamav edge-community 1.3.2-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
clamav edge-community 1.2.2-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
clamav edge-community 1.2.0-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
clamav 3.22-community 1.4.3-r0 Carlo Landmeter <clandmeter@alpinelinux.org> fixed
clamav 3.22-community 1.4.2-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
clamav 3.22-community 1.3.2-r0 None possibly vulnerable
clamav 3.22-community 1.2.2-r0 None possibly vulnerable
clamav 3.22-community 1.2.0-r0 None possibly vulnerable