CVE-2025-20260

Publication date 18 June 2025

Last updated 7 July 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.8 · Critical

Score breakdown

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.

Status

Package Ubuntu Release Status
clamav 25.04 plucky
Fixed 1.4.3+dfsg-0ubuntu0.25.04.1
24.10 oracular
Fixed 1.4.3+dfsg-0ubuntu0.24.10.1
24.04 LTS noble
Fixed 1.4.3+dfsg-0ubuntu0.24.04.1
22.04 LTS jammy
Fixed 1.4.3+dfsg-0ubuntu0.22.04.1
20.04 LTS focal
Fixed 1.4.3+dfsg-0ubuntu0.20.04.1+esm1
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty
Needs evaluation

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Severity score breakdown

Parameter Value
Base score 9.8 · Critical
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

Other references