SB20260806122 - Fedora 43 update for libcupsfilters

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Main Vulnerability Database SB20260806122

SB20260806122 - Fedora 43 update for libcupsfilters

Published: August 6, 2026

Security Bulletin ID SB20260806122
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Adjecent network
Highest impact Denial of service

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Infinite loop (CVE-ID: CVE-2026-64611)

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

CVSSv4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to an infinite loop in cfIEEE1284NormalizeMakeModel when processing an IEEE-1284 device ID with an empty MDL field. A remote attacker can advertise or inject a crafted device ID to cause a denial of service.

Network delivery is possible through printer discovery via IPP or DNS-SD, and the affected consumer can hang on one CPU core indefinitely.


2) Uncaught Exception (CVE-ID: CVE-2026-64612)

CWE-ID: CWE-248 - Uncaught Exception

CVSSv4: 5.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to an uncaught exception in the _cfImageReadPNG function when processing a malformed PNG in a print job. A remote attacker can submit a specially crafted print job containing a malformed PNG to cause a denial of service.

The issue causes the imagetoraster or imagetopdf CUPS filter process to terminate with SIGABRT, killing the in-flight print job.


Remediation

Install update from vendor's website.

References