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Fencer Intel
medium 5.1

CVE-2025-58436 json

OpenPrinting CUPS slow client can halt cupsd, leading to a possible DoS attack

published 11mo ago modified last mo. also EUVD-2025-199892

cvss
5.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 16%
public exploits
0
none known

Summary

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.

Patch / fix

  • openprinting cups 2.4.15
  • cups Debian 14 2.4.15-1

debian advisories DEBIAN-CVE-2025-58436

  • cups Ubuntu 22.04 LTS 2.4.1op1-1ubuntu4.16
  • cups Ubuntu 24.04 LTS 2.4.7-1.2ubuntu7.9
  • cups Ubuntu 25.10 2.4.12-0ubuntu3.5
  • cups Ubuntu Pro 16.04 LTS 2.1.3-4ubuntu0.11+esm12
  • cups Ubuntu Pro 18.04 LTS 2.2.7-1ubuntu2.10+esm10
  • cups Ubuntu Pro 20.04 LTS 2.3.1-9ubuntu1.9+esm4

ubuntu advisories UBUNTU-CVE-2025-58436

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • cups hummingbird 1 2.4.17-1.hum1
  • cups-lpd hummingbird 1 2.4.17-1.hum1
  • cups-libs hummingbird 1 2.4.17-1.hum1
  • cups-client hummingbird 1 2.4.17-1.hum1
  • cups-ipptool hummingbird 1 2.4.17-1.hum1
  • cups-filesystem hummingbird 1 2.4.17-1.hum1
  • cups-printerapp hummingbird 1 2.4.17-1.hum1
  • cups RHEL 8 1:2.2.6-66.el8_10

red hat advisories RHSA-2026:8814RHSA-2026:0596RHSA-2026:0464RHSA-2026:0312

  • cups Linux Micro 6.1 2.4.16-slfo.1.1_1.1
  • cups Linux Micro 6.0 2.4.16-1.1
  • cups SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 2.4.16-160000.1.1
  • cups SLE Module for Development Tools 15 SP7, SLE Module for Development Tools 15 SP6, SLE Module for Desktop Applications 15 SP7 +8 more 2.2.7-150000.3.83.1
  • cups SLE Module for Development Tools 15 SP7, SLE Module for Development Tools 15 SP6, SLE Module for Desktop Applications 15 SP7 +8 more 2.2.7-150000.3.80.1
  • cups SLE Module for Development Tools 15 SP7, SLE Module for Development Tools 15 SP6, SLE Module for Desktop Applications 15 SP7 +8 more 2.2.7-150000.3.77.1

suse advisories SUSE-SU-2026:20535-1SUSE-SU-2026:20528-1SUSE-SU-2026:20229-1SUSE-SU-2026:20231-1SUSE-SU-2025:4425-1SUSE-SU-2025:4319-1

  • cups openSUSE Leap 16.0 2.4.16-160000.1.1
  • cups openSUSE Tumbleweed 2.4.16-1.1

opensuse advisories openSUSE-SU-2026:20172-1openSUSE-SU-2026:10088-1

  • cups AlmaLinux 8 1:2.2.6-66.el8_10
  • cups-lpd AlmaLinux 8 1:2.2.6-66.el8_10
  • cups-libs AlmaLinux 8 1:2.2.6-66.el8_10
  • cups-client AlmaLinux 8 1:2.2.6-66.el8_10
  • cups-ipptool AlmaLinux 8 1:2.2.6-66.el8_10
  • cups-filesystem AlmaLinux 8 1:2.2.6-66.el8_10
  • cups-filesystem AlmaLinux 10 1:2.4.10-12.el10_1.2
  • cups AlmaLinux 9 1:2.3.3op2-34.el9_7.2

almalinux advisories ALSA-2026:0596ALSA-2026:0464ALSA-2026:0312

  • cups Rocky Linux 10 1:2.4.10-12.el10_1.2
  • cups Rocky Linux 8 1:2.2.6-66.el8_10
  • cups Rocky Linux 9 1:2.3.3op2-34.el9_7.2

rocky linux advisories RLSA-2026:0464RLSA-2026:0596RLSA-2026:0312

  • cups Alpine 3.24, Alpine 3.23, Alpine 3.22 +2 more 2.4.16-r0

alpine advisories ALPINE-CVE-2025-58436

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • cups Azure Linux 3.0 2.4.16-1
  • cups CBL-Mariner 2.0 2.3.3op2-11

azure linux advisories AZL-71143AZL-71149

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Is CVE-2025-58436 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-58436 updated cvss 5.1

cups: Slow client communication leads to a possible DoS attack

  • Red Hat Enterprise Linux 6 cups, cups-lpd, cups-php, cups-libs Red Hat Enterprise Linux 7 cups, cups-lpd, cups-libs, cups-client, cups-ipptool, cups-filesystem Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 8) cups 2.2.6-66.el8_10
    fixed: vendor fix RHSA-2026:0596
  • Red Hat Enterprise Linux AppStream (v. 9) cups 2.3.3op2-34.el9_7.2
    fixed: vendor fix RHSA-2026:0312
  • Red Hat Enterprise Linux AppStream (v. 10) cups 2.4.10-12.el10_1.2
    fixed: vendor fix RHSA-2026:0464
  • Red Hat Enterprise Linux BaseOS (v. 8) cups 2.2.6-66.el8_10, cups-libs 2.2.6-66.el8_10
    fixed: vendor fix RHSA-2026:0596
  • Red Hat Enterprise Linux BaseOS (v. 9) cups-libs 2.3.3op2-34.el9_7.2
    fixed: vendor fix RHSA-2026:0312
  • Red Hat Enterprise Linux BaseOS (v. 10) cups 2.4.10-12.el10_1.2, cups-libs 2.4.10-12.el10_1.2
    fixed: vendor fix RHSA-2026:0464
  • Red Hat Hardened Images cups 2.4.17-1.hum1, cups-lpd 2.4.17-1.hum1, cups-libs 2.4.17-1.hum1, cups-client 2.4.17-1.hum1, cups-ipptool 2.4.17-1.hum1, cups-filesystem 2.4.17-1.hum1, +1 more
    fixed: vendor fix RHSA-2026:8814
show 1 more
  • Red Hat Enterprise Linux AppStream (v. 8) cups-lpd 2.2.6-66.el8_10, cups-client 2.2.6-66.el8_10, cups-ipptool 2.2.6-66.el8_10, cups-filesystem 2.2.6-66.el8_10 Red Hat Enterprise Linux AppStream (v. 9) cups-lpd 2.3.3op2-34.el9_7.2, cups-client 2.3.3op2-34.el9_7.2, cups-ipptool 2.3.3op2-34.el9_7.2, cups-filesystem 2.3.3op2-34.el9_7.2, cups-printerapp 2.3.3op2-34.el9_7.2 Red Hat Enterprise Linux AppStream (v. 10) cups-lpd 2.4.10-12.el10_1.2, cups-client 2.4.10-12.el10_1.2, cups-ipptool 2.4.10-12.el10_1.2, cups-printerapp 2.4.10-12.el10_1.2 Red Hat Enterprise Linux BaseOS (v. 8) cups-debuginfo 2.2.6-66.el8_10, cups-debugsource 2.2.6-66.el8_10, cups-lpd-debuginfo 2.2.6-66.el8_10, cups-libs-debuginfo 2.2.6-66.el8_10, cups-client-debuginfo 2.2.6-66.el8_10, cups-ipptool-debuginfo 2.2.6-66.el8_10 Red Hat Enterprise Linux BaseOS (v. 9) cups 2.3.3op2-34.el9_7.2 Red Hat Enterprise Linux BaseOS (v. 10) cups-filesystem 2.4.10-12.el10_1.2
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
11mo ago

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/OpenPrinting/cups/security/advisories/GHSA-8wpw-vfgm-qrrr referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 5.1 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

  • OpenPrinting cups

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.