Vulnerability · Published Jul 23, 2026 · Assigned by redhat
CVE-2026-64611Libcupsfilters: cups-filters: libcupsfilters: cpu exhaustion via infinite loop in cfieee1284normalizemakemodel()
High 7.5
In plain English
A high-severity infinite loop in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | libcupsfilters | 1:2.0.0-13.el10_2 | ALSA-2026:56965 |
| Debian:13 | libcupsfilters | no fix listed | DEBIAN-CVE-2026-64611 |
| Debian:14 | libcupsfilters | no fix listed | DEBIAN-CVE-2026-64611 |
| Rocky Linux:10 | libcupsfilters | 1:2.0.0-13.el10_2 | RLSA-2026:56965 |
| Ubuntu:22.04:LTS | cups-filters | no fix listed | UBUNTU-CVE-2026-64611 |
| Ubuntu:24.04:LTS | cups-filters | no fix listed | UBUNTU-CVE-2026-64611 |
| Ubuntu:26.04:LTS | cups-filters | no fix listed | UBUNTU-CVE-2026-64611 |
| Ubuntu:26.10 | cups-filters | no fix listed | UBUNTU-CVE-2026-64611 |
| Ubuntu:24.04:LTS | libcupsfilters | no fix listed | UBUNTU-CVE-2026-64611 |
| Ubuntu:26.04:LTS | libcupsfilters | no fix listed | UBUNTU-CVE-2026-64611 |
| Ubuntu:26.10 | libcupsfilters | no fix listed | UBUNTU-CVE-2026-64611 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
Weakness: CWE-835 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- RHSA-2026:56965 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-64611 vdb-entry, x_refsource_REDHAT
- RHBZ#2502799 issue-tracking, x_refsource_REDHAT
- https://github.com/OpenPrinting/libcupsfilters/security/advisories/GHSA-rcq7-rv5g-j3r4