Infinite loop in libcupsfilters - CVE-2026-64611
Published: July 24, 2026
Vulnerability identifier: #VU139342
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-64611
CWE-ID: CWE-835
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to an infinite loop in cfIEEE1284NormalizeMakeModel when processing an IEEE-1284 device ID with an empty MDL field. A remote attacker can advertise or inject a crafted device ID to cause a denial of service.
Network delivery is possible through printer discovery via IPP or DNS-SD, and the affected consumer can hang on one CPU core indefinitely.
Affected software
libcupsfilters
How to mitigate CVE-2026-64611
Install security update from vendor's website.
libcupsfilters - update to 2.1.2