CVE-2026-107888: CWE-476: NULL Pointer Dereference in OpenPrinting CUPS
Description
CVE-2026-107888 is a medium severity vulnerability in OpenPrinting CUPS before version 2.4.20. It involves a NULL pointer dereference in the cupsdCheckJobs() function when a job marked as held on creation refers to a temporary printer that has been automatically deleted. This causes the cupsd process to terminate and interrupts all print queues it manages. The issue can be triggered by an unprivileged user under certain conditions.
CVSS v3.1
Score 5.1medium
Affected software
OpenPrinting
CUPS
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
OpenPrinting CUPS versions prior to 2.4.20 contain a NULL pointer dereference vulnerability in the cupsdCheckJobs() function. When a job marked job-held-on-create references a temporary printer that has been deleted by the temporary-printer cleanup process, the destination pointer becomes NULL. The scheduler then dereferences this NULL pointer during the check for holding_new_jobs, causing the cupsd daemon to terminate and disrupting all managed print queues. This can be triggered by an unprivileged submission in some plausible scenarios.
Potential Impact
The vulnerability causes the cupsd process to crash, interrupting all print queues managed by that process. This results in a denial of service (DoS) condition affecting printing services. There is no impact on confidentiality or integrity reported. The vulnerability requires local access with low privileges and high attack complexity.
Mitigation Recommendations
A fix is available in OpenPrinting CUPS version 2.4.20 and later. Users should upgrade to version 2.4.20 or newer to remediate this issue. No other mitigation or workaround is indicated in the provided data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-10-09T04:06:54.629Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ac86ebc2cdf04f656282e73
Added to database: 10/09/2026, 04:34:04 UTC
Last enriched: 10/09/2026, 04:48:18 UTC
Last updated: 10/09/2026, 04:49:06 UTC
Views: 4
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