Double Free in Openprinting Cups
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.
Vulnerability class: Double Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 2.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/OpenPrinting/cups/security/advisories/GHSA-pwg4-pv39-8c22 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-107886?
- CVE-2026-107886 is a low-severity vulnerability in Openprinting Cups, classified under Double Free. CVSS score: 2.3/10. Published 2026-10-09.
- How severe is CVE-2026-107886?
- Low severity. CVSS v3 base score is 2.3 out of 10.