CVE-2026-26158— Busybox: busybox: arbitrary file modification and privilege escalation via unvalidated tar archive entries
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I. Basic Information for CVE-2026-26158
Vulnerability Information
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Vulnerability Title
Busybox: busybox: arbitrary file modification and privilege escalation via unvalidated tar archive entries
Source: NVD (National Vulnerability Database)
Vulnerability Description
A flaw was found in BusyBox. This vulnerability allows an attacker to modify files outside of the intended extraction directory by crafting a malicious tar archive containing unvalidated hardlink or symlink entries. If the tar archive is extracted with elevated privileges, this flaw can lead to privilege escalation, enabling an attacker to gain unauthorized access to critical system files.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
文件名或路径的外部可控制
Source: NVD (National Vulnerability Database)
Vulnerability Title
BusyBox 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
BusyBox是乌克兰Denis Vlasenko个人开发者的一套包含了多个linux命令和工具的应用程序。 BusyBox存在安全漏洞，该漏洞源于其tar归档提取时未验证硬链接或符号链接条目，可能导致提取恶意归档时修改预期目录外的文件，进而可能权限提升。
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 Hardened Images | 1.37.0-7.2.hum1 ~ * | cpe:/a:redhat:hummingbird:1 | |
| Red Hat | Red Hat Enterprise Linux 6 | - | cpe:/o:redhat:enterprise_linux:6 |
II. Public POCs for CVE-2026-26158
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V. Comments for CVE-2026-26158
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