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Fedora 43 Launches Key Update for libcupsfilters to Fix CPU Exhaustion

Linuxsecurity •LinuxSecurity Advisories • August 11, 2026

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Libcupsfilters provides a library, which implements common functions used

in cups-browsed daemon and printing filters, and additional files

as banner templates and character sets. The filters are used in CUPS daemon

and in printer applications.

fixes CVE-2026-64611 and CVE-2026-64612 (fedora#2506364)

* Wed Aug 5 2026 Zdenek Dohnal - 1:2.1.1-9 - fixes CVE-2026-64611 and CVE-2026-64612 (fedora#2506364) * Thu Jul 16 2026 Fedora Release Engineering - 1:2.1.1-8 - Rebuilt for * Tue Jan 20 2026 Zdenek Dohnal - 1:2.1.1-7 - Rebuilt with new poppler 26.01.0 * Fri Jan 16 2026 Fedora Release Engineering - 1:2.1.1-6 - Rebuilt for

[ 1 ] Bug #2502799 - CVE-2026-64611 libcupsfilters: cups-filters: libcupsfilters: CPU exhaustion via infinite loop in cfIEEE1284NormalizeMakeModel()

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-1ed9130cea' at the command line. For more information, refer to the dnf documentation available at

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The full story

This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Fedora libcupsfilters Update Addresses CPU Exhaustion Vulnerabilities Fedora has released important updates for libcupsfilters to address CPU exhaustion vulnerabilities identified as CVE-2026-64611 and CVE-2026-64612. These vulnerabilities can lead to CPU exhaustion via an infinite loop in the cfIEEE1284NormalizeMakeModel() function, affecting systems that utilize the CUPS printing system. The vulnerabilities were published on July 20 and July 23, 2026, respectively. The updates were made available on August 5, 2026, and users are urged to apply the patches using the 'dnf' update program. The flaws could potentially allow for denial-of-service conditions on affected systems. Administrators are recommended to audit Linux privileges to mitigate risks of compromise and escalation. The updates are critical for maintaining system performance and security. 2 sources 58

Extracted Entities

CVEs (2)

CVE-2026-64611 CVE-2026-64612

Platforms (1)

Linux