CVE-2026-107655: Null Dereference (CVSS 4)

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.

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CVSS v3.1 Score

4.0

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS — Exploit Prediction

0.0013

Probability of exploitation

0.02%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-476 CWE-476

References

Other 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

Frequently Asked Questions

What is CVE-2026-107655? +

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. It has a CVSS v3.1 base score of 4.0 (MEDIUM).

How severe is CVE-2026-107655? +

CVE-2026-107655 has a CVSS v3.1 score of 4.0 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0013, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-107655? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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