CVE-2026-39314: OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions…
CVE-2026-39314 · Severity: medium · CVSS 4 · Published 2026-04-07
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, an integer underflow vulnerability in _ppdCreateFromIPP() (cups/ppd-cache.c) allows any unprivileged local user to crash the cupsd root process by supplying a negative job-password-supported IPP attribute. The bounds check only caps the upper bound, so a negative value passes validation, is cast to size_t (wrapping to ~2^64), and is used as the length argument to memset() on a 33-byte stack buffer. This causes an immediate SIGSEGV in the cupsd root process. Combined with systemd's Restart=on-failure, an attacker can repeat the crash for sustained denial of service.
No. Junglewise Threat Intelligence has no report of CVE-2026-39314 being exploited in the wild.
How severe is CVE-2026-39314?
Medium severity, with a CVSS score of 4, published 7 April 2026.
Which products and versions are affected?
OpenPrinting Cups. The advisory does not name versions.
Is there a fix for CVE-2026-39314?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-39314?
Check whether you run OpenPrinting Cups. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.