CUPS has an integer underflow in `_ppdCreateFromIPP` causes root cupsd crash via negative `job-password-supported`

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CVE-2026-39314 CUPS has an integer underflow in `_ppdCreateFromIPP` causes root cupsd crash via negative `job-password-supported`

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...

CVE-2026-39314

OpenPrinting CUPS (CVE-2026-39314) is vulnerable in versions 2.4.16 and prior. The root cause is an integer underflow in _ppdCreateFromIPP (cups/ppd-cache.c): a negative job-password-supported IPP attribute passes bounds checks, is cast to size_t, and is used as a length in memset() on a 33-byte ...

CUPS: Local denial-of-service via cupsd.conf update and related issues

A flaw was found in cups. A user in group defined by SystemGroup directive in /etc/cups/cups-files.conf can use the cups web ui to change the config and insert a malicious line. Then the cupsd process which runs as root will parse the new config and cause an out-of-bound write...