CVE-2026-107655 Cups: null pointer dereference via embedded job ticket comments allows remote denial of service
An unauthenticated attacker can crash the CUPS print daemon by sending a crafted IPP request, causing a denial of service for printing services.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-107655?
CVE-2026-107655 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 9 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw was found in CUPS. When processing embedded job ticket comments within documents, the service improperly handles specific IPP attributes, causing an unhandled null pointer dereference. An unauthenticated attacker permitted to submit jobs to a shared printer queue can send a crafted Internet Printing Protocol (IPP) request to crash the print daemon, resulting in a temporary Denial of Service (DoS) for all printing services.
Weakness: CWE-476
Which versions are affected by CVE-2026-107655?
Linux distribution packages (8)
cups Red Hat:hummingbird:1 | All versions | 0:2.4.19-4.4.hum1 |
cups-client Red Hat:hummingbird:1 | All versions | 0:2.4.19-4.4.hum1 |
cups-devel Red Hat:hummingbird:1 | All versions | 0:2.4.19-4.4.hum1 |
cups-filesystem Red Hat:hummingbird:1 | All versions | 0:2.4.19-4.4.hum1 |
cups-ipptool Red Hat:hummingbird:1 | All versions | 0:2.4.19-4.4.hum1 |
cups-libs Red Hat:hummingbird:1 | All versions | 0:2.4.19-4.4.hum1 |
cups-lpd Red Hat:hummingbird:1 | All versions | 0:2.4.19-4.4.hum1 |
cups-printerapp Red Hat:hummingbird:1 | All versions | 0:2.4.19-4.4.hum1 |
How do I fix CVE-2026-107655?
Apply the vendor's patch.
Is CVE-2026-107655 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-107655 exists.
Sources
Also known as AZL-107966, BELL-CVE-2026-107655, DEBIAN-CVE-2026-107655, ECHO-1978-a125-c068, GHSA-58wv-9ffm-5w78, RHSA-2026:80679 and 1 more.