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.
History

Sat, 10 Oct 2026 00:30:00 +0000

Type Values Removed Values Added
Title Double‑Free Vulnerability in CUPS Printer‑Class Management Leads to Denial of Service cups: cups: Denial of Service via double-free in printer class management
Weaknesses CWE-1341
References
Metrics threat_severity

None

threat_severity

Low


Fri, 09 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 09 Oct 2026 05:45:00 +0000

Type Values Removed Values Added
Title Double‑Free Vulnerability in CUPS Printer‑Class Management Leads to Denial of Service

Fri, 09 Oct 2026 04:15:00 +0000

Type Values Removed Values Added
Description 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.
First Time appeared Openprinting
Openprinting cups
Weaknesses CWE-415
CPEs cpe:2.3:a:openprinting:cups:*:*:*:*:*:*:*:*
Vendors & Products Openprinting
Openprinting cups
References
Metrics cvssV3_1

{'score': 2.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-10-09T04:00:29.308Z

Updated: 2026-10-09T18:05:33.937Z

Reserved: 2026-10-09T04:00:28.517Z

Link: CVE-2026-107886

cve-icon Vulnrichment

Updated: 2026-10-09T18:05:29.093Z

cve-icon NVD

Status : Analyzed

Published: 2026-10-09T04:18:05.163

Modified: 2026-10-20T20:56:33.730

Link: CVE-2026-107886

cve-icon Redhat

Severity : Low

Publid Date: 2026-10-09T04:00:29Z

Links: CVE-2026-107886 - Bugzilla