{"id":"CVE-2026-39314","summary":"CUPS has an integer underflow in `_ppdCreateFromIPP` causes root cupsd crash via negative `job-password-supported`","details":"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.","aliases":["GHSA-pp8w-2g52-7vj7"],"modified":"2026-04-08T12:26:29.845361Z","published":"2026-04-07T16:59:23.808Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39314.json","cwe_ids":["CWE-191"],"cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39314.json"},{"type":"ADVISORY","url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-pp8w-2g52-7vj7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39314"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/openprinting/cups","events":[{"introduced":"0"},{"last_affected":"7523763f00d2063f88026d93bc5b29806240de2b"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"2.4.16"}]}}],"versions":["v2.2.0","v2.2.1","v2.2.2","v2.2.3","v2.2.4","v2.2.5","v2.2.6","v2.2b1","v2.2b2","v2.2rc1","v2.3.0","v2.3.1","v2.3.3","v2.3.3op1","v2.3.3op2","v2.3b1","v2.3b2","v2.3b3","v2.3b4","v2.3b5","v2.3b6","v2.3b7","v2.3b8","v2.3rc1","v2.4.0","v2.4.1","v2.4.10","v2.4.11","v2.4.12","v2.4.13","v2.4.14","v2.4.15","v2.4.16","v2.4.2","v2.4.3","v2.4.4","v2.4.5","v2.4.6","v2.4.7","v2.4.8","v2.4.9","v2.4b1","v2.4rc1"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-39314.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}