# CVE-2026-64611: Libcupsfilters: cups-filters: libcupsfilters: cpu exhaustion via infinite loop in cfieee1284normalizemakemodel()

Status: published. Published: 2026-07-23. Updated: 2026-11-05.

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.

## Remediation

- workaround: If automatic network printer discovery is not strictly necessary for your environment, stopping the service completely eliminates the vulnerable attack surface.If you must use cups-browsed for legitimate operational reasons, you should prevent untrusted networks from feeding data to the daemon. (source: CNA: redhat)

## Affected products and versions

- Red Hat / Red Hat Enterprise Linux 10 (libcupsfilters): ≥ 1:2.0.0-13.el10_2; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10 (cups-filters): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (cups-filters): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (cups-filters): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (cups-filters): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 7.5 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 0.63% as of 2026-11-05; percentile 50.33%

- SSVC: exploitation none; automatable yes; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-835

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/errata/RHSA-2026:56965 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/security/cve/CVE-2026-64611 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2502799 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://github.com/OpenPrinting/libcupsfilters/security/advisories/GHSA-rcq7-rv5g-j3r4 (CNA: redhat)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-64611; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-64611; retrieved 2026-11-05; source updated Not reported

Revision: 57bf81e4b218308f52fc4b7c94e7a7cb8545457f8b16fcc81ad19cff3efc3c88

Canonical: https://y2.dev/cve/CVE-2026-64611

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