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
Patch, vendor advisory and mitigation references on NVD 1
- https://github.com/OpenPrinting/cups/security/advisories/GHSA-pp8w-2g52-7vj7 Exploit, Mitigation, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 6.2 · openprintingNVD modified 2026-10-26 21:10
Affected (CPE criteria) 1
cpe:2.3:a:openprinting:cups:*:*:*:*:*:*:*:*
References 1
- https://github.com/OpenPrinting/cups/security/advisories/GHSA-pp8w-2g52-7vj7 Exploit, Mitigation, Vendor Advisory