NULL pointer dereference in cups - CVE-2026-107655
Published: October 12, 2026
Vulnerability identifier: #VU154075
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-2026-107655
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in cupsdContinueJob() when starting print jobs containing embedded job-ticket comments. A local user can submit a crafted PostScript or PDF document containing the comment %cupsJobTicket: attributes-natural-language=xx to cause a denial of service.
Exploitation requires permission to submit jobs to an existing printer queue. The crash occurs before a document filter or backend is spawned.
Affected software
cups
How to mitigate CVE-2026-107655
Install security update from vendor's website.
cups - update to 2.4.21