Red Hat Enterprise Linux IEEE-1284 Processing cfIEEE1284NormalizeMakeModel infinite loop

Summaryinfo

A vulnerability was found in Red Hat Enterprise Linux. It has been rated as critical. This issue affects the function cfIEEE1284NormalizeMakeModel of the component IEEE-1284 Processing. The manipulation leads to infinite loop. This vulnerability is traded as CVE-2026-64611. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Red Hat Enterprise Linux (version unknown). This issue affects the function cfIEEE1284NormalizeMakeModel of the component IEEE-1284 Processing. The manipulation with an unknown input leads to a infinite loop vulnerability. Using CWE to declare the problem leads to CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. Impacted is availability. The summary by CVE is:

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.

The advisory is shared at access.redhat.com. The identification of this vulnerability is CVE-2026-64611 since 07/20/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/23/2026). MITRE ATT&CK project uses the attack technique T1499 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Operating System

Vendor

• Red Hat

Name

• Enterprise Linux

License

• commercial

Website

• Vendor: https://www.redhat.com/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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