CVE-2026-107886: Openprinting Cups

Low severity, CVSS 2.3. EPSS: 0.1% chance of exploitation in the next 30 days.

OpenPrinting CUPS before 2.4.20 contains a double-free in printer-class management. When CUPS-Add-Modify-Class replaces an existing class member list, add_class() frees pclass->printers without clearing the pointer. If subsequent validation fails, the class retains the dangling pointer; CUPS-Delete-Class subsequently frees the same allocation in cupsdDeletePrinter(). A client authorized to modify and delete classes can cause scheduler-wide denial of service. The default policy requires @SYSTEM privileges.

Affected products

• Openprinting Cups: from 1.4.8, before 2.4.20 (fixed in 2.4.20)

Published 2026-10-09. Last modified 2026-10-09.