CVE-2025-58436
cups: Slow client communication leads to a possible DoS attack
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · December 1, 2025
Updated · September 1, 2026
Description
A flaw was found in cups. A client that connects to cupsd but sends slow messages, e.g. only one byte per second, delays cupsd as a whole, such that it becomes unusable by other clients.
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 · 5.1CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-412 · Unrestricted Externally Accessible Lock