Resource exhaustion in cups - CVE-2026-107885
Published: October 12, 2026
Vulnerability identifier: #VU154074
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-107885
CWE-ID: CWE-400
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service by preventing new print job submissions.
The vulnerability exists due to improper job-specific handling of submission timeouts in cupsdCheckJobs() in scheduler/job.c when processing an incomplete Send-Document request. A local user can keep the incomplete request connection open and repeatedly issue Create-Job requests, causing unrelated pending jobs to accumulate until MaxJobs is reached, to cause a denial of service.
Exploitation requires access to the IPP service permitted by the configured host ACL and a queue accepting job creation.
Affected software
cups
How to mitigate CVE-2026-107885
Install security update from vendor's website.
cups - update to 2.4.21