CVE-2026-64611: Loop with Unreachable Exit Condition ('Infinite Loop') in Red Hat Red Hat Enterprise Linux 10
CVE-2026-64611 is a high-severity vulnerability in the libcupsfilters component of Red Hat Enterprise Linux 10. The cfIEEE1284NormalizeMakeModel() function can enter an infinite loop when processing a printer-advertised IEEE-1284 device ID that contains an empty model field. This flaw can be exploited by a network-adjacent attacker broadcasting a specially crafted printer advertisement, resulting in sustained CPU consumption and denial of service.
AI Analysis
Technical Summary
This vulnerability involves an infinite loop in the libcupsfilters library's cfIEEE1284NormalizeMakeModel() function triggered by a malformed IEEE-1284 device ID with an empty model field. The infinite loop causes excessive CPU usage, leading to a denial of service condition. The flaw can be exploited remotely by an attacker on the same network segment by sending a crafted printer advertisement. The CVSS v3.1 base score is 7.5, reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and impact limited to availability (denial of service).
Potential Impact
Successful exploitation results in denial of service due to sustained CPU consumption caused by an infinite loop. There is no confidentiality or integrity impact reported. The attack requires network adjacency but no authentication or user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-64611 for current remediation guidance. No official fix or workaround is explicitly stated in the provided advisory content. Monitor the vendor advisory for updates and apply patches once available.
CVE-2026-64611: Loop with Unreachable Exit Condition ('Infinite Loop') in Red Hat Red Hat Enterprise Linux 10
Description
CVE-2026-64611 is a high-severity vulnerability in the libcupsfilters component of Red Hat Enterprise Linux 10. The cfIEEE1284NormalizeMakeModel() function can enter an infinite loop when processing a printer-advertised IEEE-1284 device ID that contains an empty model field. This flaw can be exploited by a network-adjacent attacker broadcasting a specially crafted printer advertisement, resulting in sustained CPU consumption and denial of service.
CVSS v3.1
Score 7.5high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an infinite loop in the libcupsfilters library's cfIEEE1284NormalizeMakeModel() function triggered by a malformed IEEE-1284 device ID with an empty model field. The infinite loop causes excessive CPU usage, leading to a denial of service condition. The flaw can be exploited remotely by an attacker on the same network segment by sending a crafted printer advertisement. The CVSS v3.1 base score is 7.5, reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and impact limited to availability (denial of service).
Potential Impact
Successful exploitation results in denial of service due to sustained CPU consumption caused by an infinite loop. There is no confidentiality or integrity impact reported. The attack requires network adjacency but no authentication or user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-64611 for current remediation guidance. No official fix or workaround is explicitly stated in the provided advisory content. Monitor the vendor advisory for updates and apply patches once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-07-20T11:15:34.675Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-64611","vendor":"Red Hat"}]
Threat ID: 6a61f5fe9c2644c7f8f13001
Added to database: 07/23/2026, 11:07:42 UTC
Last enriched: 07/23/2026, 11:22:00 UTC
Last updated: 07/23/2026, 11:22:00 UTC
Views: 4
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