Use-after-free in cups - CVE-2026-39316
Published: April 11, 2026 / Updated: April 17, 2026
Vulnerability identifier: #VU125824
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-39316
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: OpenPrinting
Affected software:
cups
cups
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to use-after-free in cupsdDeleteTemporaryPrinters() in scheduler/printers.c when deleting temporary printers that still have subscriptions referencing them. A local user can create a temporary printer with a subscription and trigger dereference of the dangling subscription pointer to execute arbitrary code.
The dangling pointer is subsequently dereferenced at multiple code sites in the scheduler, and the advisory confirms denial of service with potential code execution through heap grooming.
How to mitigate CVE-2026-39316
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.