Vulnerability Description
A flaw was found in the Samba printing subsystem. Samba passes the client-controlled job description string to the command configured with the "print command" setting via the "%J" substitution character without escaping shell meta characters. A remote attacker could exploit this vulnerability by sending a specially crafted print job description that contains unescaped shell characters. This could lead to remote code execution on the affected system.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Openshift Container Platform | 4.0 |
| Samba | Samba | >= 4.1.0, < 4.2.1 |
| Redhat | Enterprise Linux | 7.0 |
Related Weaknesses (CWE)
References
- https://access.redhat.com/errata/RHSA-2026:22644
- https://access.redhat.com/errata/RHSA-2026:22963
- https://access.redhat.com/errata/RHSA-2026:25049
- https://access.redhat.com/errata/RHSA-2026:25979
- https://access.redhat.com/errata/RHSA-2026:28053
- https://access.redhat.com/errata/RHSA-2026:28054
- https://access.redhat.com/errata/RHSA-2026:28055
- https://access.redhat.com/errata/RHSA-2026:28056
- https://access.redhat.com/errata/RHSA-2026:28057
- https://access.redhat.com/errata/RHSA-2026:28058
- https://access.redhat.com/errata/RHSA-2026:28132
- https://access.redhat.com/security/cve/CVE-2026-4480MitigationThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2452232Issue TrackingThird Party Advisory
- https://bugzilla.samba.org/show_bug.cgi?id=16033Issue TrackingVendor Advisory
- https://access.redhat.com/errata/RHSA-2026:22644
FAQ
What is CVE-2026-4480?
CVE-2026-4480 is a vulnerability with a CVSS score of 9.0 (CRITICAL). A flaw was found in the Samba printing subsystem. Samba passes the client-controlled job description string to the command configured with the "print command" setting via the "%J" substitution charact...
How severe is CVE-2026-4480?
CVE-2026-4480 has been rated CRITICAL with a CVSS base score of 9.0/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-4480?
Check the references section above for vendor advisories and patch information. Affected products include: Redhat Openshift Container Platform, Samba Samba, Redhat Enterprise Linux.