CVE-2026-107886

cups: cups: Denial of Service via double-free in printer class management

Published Oct 9, 2026 CVSS 3.1 · 2.3 Low EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
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

Type Values Removed Values Added
Metrics ssvc

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

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Oct 9, 2026, 6:05 PM
Reserved
Oct 9, 2026, 4:00 AM
Status
Analyzed
Published
Oct 9, 2026, 4:18 AM
Modified
Oct 20, 2026, 8:56 PM
Severity
Low
Public date
Oct 9, 2026, 4:00 AM