OpenPrinting CUPS through 2.4.20 contains a resource-exhaustion vulnerability in the submission-timeout handling of cupsdCheckJobs(). The scheduler suppresses timeout processing for all pending jobs whenever any client connection has an in-flight Send-Document operation, without matching that connection to the job being examined. A client allowed to reach the IPP service can hold an incomplete HTTP request containing parsed Send-Document headers before operation authorization, preventing unrelated incomplete jobs from expiring. Where Create-Job submission is allowed, incomplete jobs can accumulate until MaxJobs is exhausted and further legitimate print submissions are rejected. The suppression ends when the held connection closes.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/OpenPrinting/cups/security/advisories/GHSA-hhw5-qqmc-p6rg Exploit, Vendor Advisory
- https://github.com/OpenPrinting/cups/security/advisories/GHSA-hhw5-qqmc-p6rg Exploit, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 4
- Cpes+1 CPE criteria (now 1)NVD modified 2026-10-20 20:58
- StatusAwaiting Analysis → AnalyzedNVD modified 2026-10-20 20:58
- CVSS3.3 (v3.1, CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L) → 5.5 (v3.1, CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)NVD modified 2026-10-20 20:58
- First seenCVSS 3.3NVD modified 2026-10-09 21:17
Affected (CPE criteria) 1
cpe:2.3:a:openprinting:cups:*:*:*:*:*:*:*:*
References 2
- https://github.com/OpenPrinting/cups/security/advisories/GHSA-hhw5-qqmc-p6rg Exploit, Vendor Advisory
- https://github.com/OpenPrinting/cups/security/advisories/GHSA-hhw5-qqmc-p6rg Exploit, Vendor Advisory