OpenPrinting CUPS DoS via Slow Messages prior to v2.4.15
CVE-2025-58436 Published on November 29, 2025
OpenPrinting CUPS slow client can halt cupsd, leading to a possible DoS attack
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to version 2.4.15, 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. This issue has been patched in version 2.4.15.
Vulnerability Analysis
CVE-2025-58436 is exploitable with local system access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. Public availability of a proof of concept (POC) exploit exists for CVE-2025-58436. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Resource Exhaustion Vulnerability?
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
CVE-2025-58436 has been classified to as a Resource Exhaustion vulnerability or weakness.
Products Associated with CVE-2025-58436
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Affected Versions
OpenPrinting cups Version < 2.4.15 is affected by CVE-2025-58436Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.