# CVE-2026-39314: OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions…

Source: https://junglewise.ai/threats/cve-2026-39314-openprinting-cups-is-an-open-source-printing-system-for-linux-and  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-07  
License: CC BY 4.0 with a link back

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.

Technologies: [OpenPrinting Cups](https://junglewise.ai/threats/technologies/cups). Vendors: [OpenPrinting](https://junglewise.ai/threats/vendors/openprinting).

## Quick answers

**Is CVE-2026-39314 exploited in the wild?** 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.

## Affected products

- OpenPrinting Cups

## Related threats

- [OpenPrinting CUPS path traversal in banner processing](https://junglewise.ai/threats/cve-2026-61702-openprinting-cups-is-an-open-source-printing-system-for-linux-and)
- [OpenPrinting CUPS symlink-based file truncation in scheduler](https://junglewise.ai/threats/cve-2026-55480-openprinting-cups-is-an-open-source-printing-system-for-linux-and)
- [CUPS null pointer dereference in IPP job ticket handling](https://junglewise.ai/threats/cve-2026-107655-a-flaw-was-found-in-cups-when-processing-embedded-job-ticket)
- [OpenPrinting CUPS NULL pointer dereference in cupsdCheckJobs](https://junglewise.ai/threats/cve-2026-107888-openprinting-cups-before-2-4-20-contains-a-null-pointer)
- [CUPS scheduler case-insensitive username comparison in ACL validation](https://junglewise.ai/threats/cve-2026-87876-cups-scheduler-case-insensitive-username-comparison-in-acl)