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 3.1

6.5CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 15% of CVEs (scores of 2026-10-25)

CWE

CWE-415

Published

2026-10-09

Modified

2026-10-20

Record from

the NVD, synced 2026-10-21

Affected

• 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

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