What’s Vulnerable › Vulnerabilities

CVE-2026-107655: Cups: null pointer dereference via embedded job ticket comments allows remote denial of service

• Severity: medium (CVSS 4.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-09 · updated 2026-10-12
• Weakness: CWE-476

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.

Affected products

• Red Hat Enterprise Linux 10: all versions
• Red Hat Enterprise Linux 7: all versions
• Red Hat Enterprise Linux 8: all versions
• Red Hat Enterprise Linux 9: all versions
• Red Hat Hardened Images: all versions — fixed in 2.4.19-4.4.hum1

How to fix

Upgrade to a fixed version: Red Hat Hardened Images 2.4.19-4.4.hum1. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2026:80679
• https://access.redhat.com/security/cve/CVE-2026-107655
• https://bugzilla.redhat.com/show_bug.cgi?id=2548399
• https://github.com/OpenPrinting/cups/commit/12237ad
• https://github.com/OpenPrinting/cups/commit/25d6830
• https://github.com/OpenPrinting/cups/security/advisories/GHSA-58wv-9ffm-5w78
• https://github.com/OpenPrinting/cups/security/advisories/GHSA-58wv-9ffm-5w78

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