CVE-2026-4480

Description

samba: Samba: Remote Code Execution in printing subsystem via unescaped job description

Red Hat statement

The issue affects the Samba printing subsystem. Red Hat has classified this issue as Important severity rather than Critical. Print servers configured with ```"printing = cups"``` or ```"printing = iprint"```, and print servers that do not have the ```"%J"``` substitution character in the "print command" setting are not affected. By default, Red Hat Enterprise Linux ships with Samba configured to use CUPS-based printing ```printing = cups```. Hence, although the vulnerable code is present, it is not exploitable in default RHEL configurations. In addition, typical RHEL Samba deployments require authenticated access to submit print jobs, therefore Privileges Required are assessed as Low (PR:L). Because exploitation depends on non-default Samba printing configurations and requires use of the %J substitution parameter within print command, the attack complexity is considered High (AC:H), reducing the likelihood of exploitation in standard deployments.

CVSS v3: 8.5 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H)

Package state