CVE-2026-4480

Samba: samba: remote code execution in printing subsystem via unescaped job description

State: Published
Severity: 9.0 Critical
Published: May 26, 2026
Updated: Sep 1, 2026
Reserved: Mar 19, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	9.0 Critical	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H	redhat
3.1	9.0 Critical	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H	redhat-SADP

Weaknesses

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Affected Products

Product	Versions
Red Hat Enterprise Linux 10Red Hat	0:4.23.5-109.el10_2 and laterNot affected
Red Hat Enterprise Linux 10.0 Extended Update SupportRed Hat	0:4.21.3-114.el10_0.1 and laterNot affected
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRed Hat	0:4.10.16-26.el7_9.1 and laterNot affected
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRed Hat	0:4.10.16-26.el7_9.1 and laterNot affected
Red Hat Enterprise Linux 8Red Hat	0:4.19.4-16.el8_10 and laterNot affected
Red Hat Enterprise Linux 8Red Hat	0:4.19.4-16.el8_10 and laterNot affected
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRed Hat	0:4.13.3-12.el8_4.1 and laterNot affected
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRed Hat	0:4.13.3-12.el8_4.1 and laterNot affected
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRed Hat	0:4.15.5-16.el8_6.1 and laterNot affected
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnRed Hat	0:4.15.5-16.el8_6.1 and laterNot affected
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRed Hat	0:4.17.5-7.el8_8.1 and laterNot affected
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRed Hat	0:4.17.5-7.el8_8.1 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:4.23.5-10.el9_8 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:4.23.5-10.el9_8 and laterNot affected
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRed Hat	0:4.17.5-105.el9_2.5 and laterNot affected
Red Hat Enterprise Linux 9.4 Update Services for SAP SolutionsRed Hat	0:4.19.4-105.el9_4.4 and laterNot affected
Red Hat Enterprise Linux 9.6 Extended Update SupportRed Hat	0:4.21.3-14.el9_6.1 and laterNot affected
Red Hat Enterprise Linux 6Red Hat
Red Hat Enterprise Linux 6Red Hat
Red Hat OpenShift Container Platform 4Red Hat
Red Hat OpenShift Container Platform 4Red Hat

References

RHSA-2026:22644vendor-advisory
RHSA-2026:22963vendor-advisory
RHSA-2026:25049vendor-advisory
RHSA-2026:25979vendor-advisory
RHSA-2026:28053vendor-advisory
RHSA-2026:28054vendor-advisory
RHSA-2026:28055vendor-advisory
RHSA-2026:28056vendor-advisory
RHSA-2026:28057vendor-advisory
RHSA-2026:28058vendor-advisory
RHSA-2026:28132vendor-advisory
https://access.redhat.com/security/cve/CVE-2026-4480vdb-entry
RHBZ#2452232issue-tracking
https://bugzilla.samba.org/show_bug.cgi?id=16033
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4480.json

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.