CVE-2026-107886 Use after free in CUPS
An authenticated attacker with system privileges can cause a denial of service in the CUPS scheduler via a double-free vulnerability in printer class management.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-107886?
CVE-2026-107886 is a low-severity use after free vulnerability in OpenPrinting CUPS, published on 9 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-415
Which versions are affected by CVE-2026-107886?
It affects 1 product.
Products include Openprinting Cups.
How do I fix CVE-2026-107886?
Upgrade to a fixed version.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-107886 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-107886 exists.
Other vulnerabilities in OpenPrinting CUPS
- CVE-2025-58060 cups has Authentication bypass with AuthType Negotiate
- CVE-2026-34978 Path traversal in cups
- CVE-2025-58364 cups: Remote DoS via null dereference
- CVE-2026-34980 OpenPrinting CUPS: Shared PostScript queue lets anonymous Print-Job requests reach `lp` code execution over the network
- CVE-2025-61915 OpenPrinting CUPS vulnerable to stack based out-of-bound write
Sources
Also known as AZL-106893, BELL-CVE-2026-107886, DEBIAN-CVE-2026-107886, ECHO-fd65-8a57-d554, GHSA-39g6-9jhp-qp3g, GHSA-pwg4-pv39-8c22 and 1 more.