CVE-2026-107886

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.

• CWE-415

• https://github.com/OpenPrinting/cups/security/advisories/GHSA-pwg4-pv39-8c22
• https://github.com/OpenPrinting/cups/security/advisories/GHSA-pwg4-pv39-8c22

Published

Oct 9, 2026

Last Modified

Oct 9, 2026

Status

Awaiting Analysis

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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