Integer underflow in cups - CVE-2026-39314
Published: April 11, 2026 / Updated: April 17, 2026
Vulnerability identifier: #VU125822
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-39314
CWE-ID: CWE-191
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 cause a denial of service.
The vulnerability exists due to integer underflow in _ppdCreateFromIPP() in cups/ppd-cache.c when processing a negative job-password-supported IPP attribute. A local user can supply a crafted IPP response to cause a denial of service.
Exploitation involves creating a local printer that points to a fake IPP printer on localhost, causing the cupsd root process to crash.
How to mitigate CVE-2026-39314
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.