CVE-2025-61915
CUPS: Local denial-of-service via cupsd.conf update and related issues
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · November 28, 2025
Updated · September 1, 2026
Description
A flaw was found in cups. A user in group defined by SystemGroup directive in /etc/cups/cups-files.conf can use the cups web ui to change the config and insert a malicious line. Then the cupsd process which runs as root will parse the new config and cause an out-of-bound write.
Statement
The highest threat of this flaw is to system availability. A local attacker with high privileges, specifically a user belonging to the SystemGroup as defined in /etc/cups/cups-files.conf, could exploit the CUPS web interface to introduce a malicious configuration line into cupsd.conf, leading to a denial of service.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
CVSS / CWE
CVSS 3.1 · 6CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
CWE-1173 · Improper Use of Validation Framework