CVE-2026-64611
Libcupsfilters: cups-filters: libcupsfilters: cpu exhaustion via infinite loop in cfieee1284normalizemakemodel()
What happened?
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 software and versions
| Software | Version information | Fixed version |
|---|---|---|
| libcupsfiltersRed Hat | unaffected: 1:2.0.0-13.el10_2 to < * | See vendor advisory |
| cups-filtersRed Hat | Default status: unaffected | See vendor advisory |
| cups-filtersRed Hat | Default status: unaffected | See vendor advisory |
| cups-filtersRed Hat | Default status: unaffected | See vendor advisory |
| cups-filtersRed Hat | Default status: unaffected | See vendor advisory |
Version information comes from the source record and can include unaffected products and exceptions. Distribution packages may contain backported fixes: an older upstream version alone does not prove a server is affected.
Is it being exploited?
This CVE was not listed in the CISA catalogue at our last retrieval. This does not establish that exploitation is absent.
How to respond
- Confirm the product, installed package version, and any configuration requirements in the vendor advisory.
- Follow the vendor’s remediation or workaround guidance in the references below. Structured fixed-version data is unavailable here; the publisher’s description may include a fix or workaround.
- Restart affected services if required, then verify the running version. Known exploitation may warrant investigation as well as patching.