PT-2026-30924 · Openprinting · Cups

Published 2026-04-07 · Updated 2026-04-07 · CVE-2026-39314

NVD

CVSS v3.1

4.0

Medium

AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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.

Fix

Integer Underflow

Weakness Enumeration

CWE-191

Related Identifiers

CVE-2026-39314

Affected Products

Cups

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-39314 · Security Note
• https://github.com/OpenPrinting/cups/security/advisories/GHSA-pp8w-2g52-7vj7 · Note