CUPS Slow Client Communication denial of service

CVSS Meta Temp Score
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CTI Interest Score
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4.5$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in CUPS. This affects an unknown function of the component Slow Client Communication Handler. This manipulation causes denial of service. This vulnerability is registered as CVE-2025-58436. Remote exploitation of the attack is possible. No exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability has been found in CUPS (the affected version is unknown) and classified as problematic. Affected by this vulnerability is an unknown code of the component Slow Client Communication Handler. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

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.

It is possible to read the advisory at seclists.org. This vulnerability is known as CVE-2025-58436. The exploitation appears to be difficult. The attack can be launched remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 276954 (Linux Distros Unpatched Vulnerability : CVE-2025-58436), which helps to determine the existence of the flaw in a target environment.

Applying the patch 40008d76a001babbb9beb9d9d74b01a86fb6ddb4 is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the databases at Tenable (276954), EUVD (EUVD-2025-199892) and CERT Bund (WID-SEC-2025-2693). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • RESF Rocky Linux
  • Open Source CUPS

Productinfo

Type

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.5

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CNA Base Score: 5.1
CNA Vector: 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 276954
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-58436

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 40008d76a001babbb9beb9d9d74b01a86fb6ddb4

Timelineinfo

11/27/2025 Advisory disclosed
11/27/2025 +0 days VulDB entry created
01/17/2026 +51 days VulDB entry last update

Sourcesinfo

Advisory: seclists.org
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2025-58436 (🔒)
GCVE (CVE): GCVE-0-2025-58436
GCVE (VulDB): GCVE-100-333715
EUVD: 🔒
CERT Bund: WID-SEC-2025-2693 - CUPS: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 11/27/2025 20:21
Updated: 01/17/2026 17:26
Changes: 11/27/2025 20:21 (53), 11/28/2025 10:15 (7), 11/29/2025 05:07 (12), 11/29/2025 08:50 (1), 12/03/2025 12:07 (2), 12/05/2025 17:03 (11), 01/10/2026 02:34 (1), 01/17/2026 17:26 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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