CVE-2026-39316
CUPS has a use-after-free in `cupsdDeleteTemporaryPrinters` via dangling subscription pointer
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, a use-after-free vulnerability exists in the CUPS scheduler (cupsd) when temporary printers are automatically deleted. cupsdDeleteTemporaryPrinters() in scheduler/printers.c calls cupsdDeletePrinter() without first expiring subscriptions that reference the printer, leaving cupsd_subscription_t.dest as a dangling pointer to freed heap memory. The dangling pointer is subsequently dereferenced at multiple code sites, causing a crash (denial of service) of the cupsd daemon. With heap grooming, this can be leveraged for code execution.
| CWE | CWE-416 |
| Vendor | openprinting |
| Product | cups |
| Published | Apr 7, 2026 |
| Last Updated | Apr 9, 2026 |
Get instant alerts for openprinting cups
Be the first to know when new medium vulnerabilities affecting openprinting cups are published — delivered to Slack, Telegram or Discord.
CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L