High [CVE-2026-64611] cpu exhaustion via infinite loop in cfieee1284normalizemakemodel
This high-severity Red Hat Linux advisory covers CVE-2026-64611 affecting Red Hat Enterprise Linux 10, Red Hat package: libcupsfilters.
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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. A Moderate denial-of-service vulnerability in libcupsfilters allows network attackers to exhaust CPU resources by sending malformed IEEE-1284 device IDs.
Red Hat rates this as Moderate because the vulnerable component, cups-browsed, is disabled by default in RHEL. Red Hat severity: Moderate — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-835. Affected Red Hat products: Red Hat Enterprise Linux 10.
Red Hat fixing advisory: RHSA-2026:56965.
Affected products named by the advisory: Red Hat package: libcupsfilters.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
- libcupsfilters-1:2.0.0-13.el10_2
- RHSA-2026:56965
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
Mitigation checklist
- 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.
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
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