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Fencer Vulns
high 7.5

CVE-2026-64611 json

Libcupsfilters: cups-filters: libcupsfilters: cpu exhaustion via infinite loop in cfieee1284normalizemakemodel()

published 2026-07-23 3 mo ago modified 2026-11-05 3 d ago also EUVD-2026-47973

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

A flaw was found in libcupsfilters. The cfIEEE1284NormalizeMakeModel() function enters an infinite loop when processing a printer-advertised IEEE-1284 device ID with an empty model field, causing sustained CPU consumption. A network-adjacent attacker could exploit this by broadcasting a specially crafted printer advertisement, leading to denial of service.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 10 1:2.0.0-13.el10_2
  • libcupsfilters RHEL 10.2 1:2.0.0-13.el10_2

red hat advisories RHSA-2026:56965

  • libcupsfilters SLES 16.0, SLES for SAP applications 16.0 2.1.1-160000.3.1
  • cups-filters SLE Module for Basesystem 15 SP7 1.25.0-150200.3.31.1
  • cups-filters SLES LTSS Extended Security 12 SP5 1.0.58-19.38.1

suse advisories SUSE-SU-2026:23695-1SUSE-SU-2026:23715-1SUSE-SU-2026:3935-1SUSE-SU-2026:3918-1

  • cups-filters openSUSE Leap 16.0 1.28.17-bp160.2.1
  • libcupsfilters openSUSE Leap 16.0 2.1.1-160000.3.1
  • cups-filters openSUSE Tumbleweed 1.28.17-9.1
  • libcupsfilters openSUSE Tumbleweed 2.1.1-2.1

opensuse advisories openSUSE-SU-2026:21850-1openSUSE-SU-2026:21818-1openSUSE-SU-2026:11681-1openSUSE-SU-2026:11687-1

  • libcupsfilters AlmaLinux 10 1:2.0.0-13.el10_2

almalinux advisories ALSA-2026:56965

  • libcupsfilters Rocky Linux 10 1:2.0.0-13.el10_2

rocky linux advisories RLSA-2026:56965

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-2026-64611 updated cvss 7.5

libcupsfilters: cups-filters: libcupsfilters: CPU exhaustion via infinite loop in cfIEEE1284NormalizeMakeModel()

  • Red Hat Enterprise Linux AppStream (v. 10) libcupsfilters 2.0.0-13.el10_2
    fixed: vendor fix RHSA-2026:56965
  • Red Hat Enterprise Linux 7 cups-filters, cups-filters-libs Red Hat Enterprise Linux 8 cups-filters, cups-filters-libs Red Hat Enterprise Linux 9 cups-filters, cups-filters-libs
    not affected: vulnerable code not present
  • Red Hat Enterprise Linux 10 cups-filters
    not affected: component not present
  • Red Hat Enterprise Linux AppStream (v. 10) libcupsfilters-debuginfo 2.0.0-13.el10_2, libcupsfilters-debugsource 2.0.0-13.el10_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
none
Automatable
yes
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.63% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness
  • CWE-835 Loop with Unreachable Exit Condition

References

Sources

Fencer Vulns 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.