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.

CVSS v3 2.3 LOW

2.3^/10

CVSS v3 : LOW

Vector :

Exploitability : 0.8 / Impact : 1.4

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/OpenPrinting/cups/security/advisories/GHSA-pwg4-pv39-8c22	Exploit Patch Vendor Advisory
https://github.com/OpenPrinting/cups/security/advisories/GHSA-pwg4-pv39-8c22	Exploit Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:openprinting:cups:*:*:*:*:*:*:*:*

History

20 Oct 2026, 20:56

Type	Values Removed	Values Added
First Time		Openprinting cups Openprinting
CPE		cpe:2.3:a:openprinting:cups::::::::
References	~~() https://github.com/OpenPrinting/cups/security/advisories/GHSA-pwg4-pv39-8c22 -~~	() https://github.com/OpenPrinting/cups/security/advisories/GHSA-pwg4-pv39-8c22 - Exploit, Patch, Vendor Advisory

09 Oct 2026, 18:17

Type	Values Removed	Values Added
References	~~() https://github.com/OpenPrinting/cups/security/advisories/GHSA-pwg4-pv39-8c22 -~~	() https://github.com/OpenPrinting/cups/security/advisories/GHSA-pwg4-pv39-8c22 -

09 Oct 2026, 04:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-09 04:18

Updated : 2026-10-20 20:56

NVD link : CVE-2026-107886

Mitre link : CVE-2026-107886

CVE.ORG link : CVE-2026-107886

JSON object : View

Products Affected

openprinting

cups

CWE

CWE-415

Double Free

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