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CVE-2026-4480— Samba: samba: remote code execution in printing subsystem via unescaped job description

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Samba是Samba开源的一个适用于 Linux 和 Unix 的标准 Windows 互操作性程序套件。 Samba存在操作系统命令注入漏洞，该漏洞源于将客户端控制的作业描述字符串传递给打印命令时未转义shell元字符，可能导致远程攻击者通过特制打印作业描述执行远程代码。

CVSS 9.0 · Critical EPSS 13.93% · P96

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 20

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 0:4.23.5-109.el10_2< * unaffected
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:4.21.3-114.el10_0.1< * unaffected
Red Hat Red Hat Enterprise Linux 6 any unknown
any unknown
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:4.10.16-26.el7_9.1< * unaffected
0:4.10.16-26.el7_9.1< * unaffected
Red Hat Red Hat Enterprise Linux 8 0:4.19.4-16.el8_10< * unaffected
0:4.19.4-16.el8_10< * unaffected
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:4.13.3-12.el8_4.1< * unaffected
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:4.13.3-12.el8_4.1< * unaffected
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:4.15.5-16.el8_6.1< * unaffected
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:4.15.5-16.el8_6.1< * unaffected
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:4.17.5-7.el8_8.1< * unaffected
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:4.17.5-7.el8_8.1< * unaffected
Red Hat Red Hat Enterprise Linux 9 0:4.23.5-10.el9_8< * unaffected
0:4.23.5-10.el9_8< * unaffected
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:4.17.5-105.el9_2.5< * unaffected
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:4.19.4-105.el9_4.4< * unaffected
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:4.21.3-14.el9_6.1< * unaffected
Red Hat Red Hat OpenShift Container Platform 4 any unaffected
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I. Basic Information for CVE-2026-4480

Vulnerability Information
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Samba: samba: remote code execution in printing subsystem via unescaped job description
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Samba 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Samba是Samba开源的一个适用于 Linux 和 Unix 的标准 Windows 互操作性程序套件。 Samba存在操作系统命令注入漏洞，该漏洞源于将客户端控制的作业描述字符串传递给打印命令时未转义shell元字符，可能导致远程攻击者通过特制打印作业描述执行远程代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 0:4.23.5-109.el10_2 ~ * cpe:/o:redhat:enterprise_linux:10.2
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:4.21.3-114.el10_0.1 ~ * cpe:/o:redhat:enterprise_linux_eus:10.0
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:4.10.16-26.el7_9.1 ~ * cpe:/o:redhat:enterprise_linux:7::server
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:4.10.16-26.el7_9.1 ~ * cpe:/o:redhat:enterprise_linux:7::server
Red Hat Red Hat Enterprise Linux 8 0:4.19.4-16.el8_10 ~ * cpe:/a:redhat:enterprise_linux:8::appstream
Red Hat Red Hat Enterprise Linux 8 0:4.19.4-16.el8_10 ~ * cpe:/a:redhat:enterprise_linux:8::appstream
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:4.13.3-12.el8_4.1 ~ * cpe:/o:redhat:rhel_aus:8.4::baseos
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:4.13.3-12.el8_4.1 ~ * cpe:/o:redhat:rhel_aus:8.4::baseos
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:4.15.5-16.el8_6.1 ~ * cpe:/a:redhat:rhel_aus:8.6::appstream
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:4.15.5-16.el8_6.1 ~ * cpe:/a:redhat:rhel_aus:8.6::appstream
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:4.17.5-7.el8_8.1 ~ * cpe:/a:redhat:rhel_e4s:8.8::appstream
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:4.17.5-7.el8_8.1 ~ * cpe:/a:redhat:rhel_e4s:8.8::appstream
Red Hat Red Hat Enterprise Linux 9 0:4.23.5-10.el9_8 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9 0:4.23.5-10.el9_8 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:4.17.5-105.el9_2.5 ~ * cpe:/a:redhat:rhel_e4s:9.2::appstream
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:4.19.4-105.el9_4.4 ~ * cpe:/a:redhat:rhel_e4s:9.4::appstream
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:4.21.3-14.el9_6.1 ~ * cpe:/a:redhat:rhel_eus:9.6::appstream
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2026-4480

# POC Description Source Link Shenlong Link
1 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. https://github.com/projectdiscovery/nuclei-templates/blob/main/javascript/cves/2026/CVE-2026-4480.yaml POC Details
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III. Intelligence Information for CVE-2026-4480

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Patches & Fixes for CVE-2026-4480 (1)

Vendor Advisories for CVE-2026-4480 (3)

Other References for CVE-2026-4480 (9)

Same Patch Batch · Red Hat · 2026-05-26 · 3 CVEs total

CVE-2026-7374 9.9 CRITICAL Kubevirt: kubevirt virt-handler: privilege escalation and node compromise via symlink foll
CVE-2026-48864 7.8 HIGH Libsolv: heap buffer overflow in libsolv repopagestore via unchecked decompression of mali

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-78

V. Comments for CVE-2026-4480

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