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CVE-2026-35376— uutils coreutils chcon Security Bypass and Mandatory Access Control (MAC) Inconsistency via TOCTOU Race Condition

CVSS 4.5 · Medium EPSS 0.01% · P1
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I. Basic Information for CVE-2026-35376

Vulnerability Information
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Vulnerability Title
uutils coreutils chcon Security Bypass and Mandatory Access Control (MAC) Inconsistency via TOCTOU Race Condition
Source: NVD (National Vulnerability Database)
Vulnerability Description
A Time-of-Check to Time-of-Use (TOCTOU) vulnerability exists in the chcon utility of uutils coreutils during recursive operations. The implementation resolves recursive targets using a fresh path lookup (via fts_accpath) rather than binding the traversal and label application to the specific directory state encountered during traversal. Because these operations are not anchored to file descriptors, a local attacker with write access to a directory tree can exploit timing-sensitive rename or symbolic link races to redirect a privileged recursive relabeling operation to unintended files or directories. This vulnerability breaks the hardening expectations for SELinux administration workflows and can lead to the unauthorized modification of security labels on sensitive system objects.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: NVD (National Vulnerability Database)
Vulnerability Title
uutils coreutils 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
uutils coreutils是Uutils开源的一个跨平台核心命令行工具集。 uutils coreutils存在安全漏洞，该漏洞源于chcon递归操作中存在检查时间到使用时间竞争条件，可能导致本地攻击者利用重命名或符号链接竞争，将特权递归重新标记操作重定向到意外文件或目录，从而未经授权修改敏感系统对象的安全标签。
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

VendorProductAffected VersionsCPESubscribe
Uutilscoreutils 0 ~ 0.8.0 -

II. Public POCs for CVE-2026-35376

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III. Intelligence Information for CVE-2026-35376

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Same Patch Batch · Uutils · 2026-04-22 · 44 CVEs total

CVE-2026-353387.3 HIGHuutils coreutils chmod Path Traversal Bypass of --preserve-root
CVE-2026-353687.2 HIGHuutils coreutils chroot Local Privilege Escalation and chroot Escape in via Name Service S
CVE-2026-353417.1 HIGHuutils coreutils mkfifo Unauthorized Permission Change on Existing Files
CVE-2026-353527.0 HIGHuutils coreutils mkfifo Privilege Escalation via TOCTOU Race Condition
CVE-2026-353496.7 MEDIUMuutils coreutils Path-Based Safety Bypass with --preserve-root
CVE-2026-353506.6 MEDIUMuutils coreutils cp Unexpected Privileged Executable Creation with -p
CVE-2026-353656.6 MEDIUMuutils coreutils mv Denial of Service and Data Duplication via Improper Symlink Expansion
CVE-2026-353566.3 MEDIUMuutils coreutils install Arbitrary File Overwrite with -D via Path Component Symlink Race
CVE-2026-353646.3 MEDIUMuutils coreutils mv Arbitrary File Overwrite via Cross-Device TOCTOU Race Condition
CVE-2026-353746.3 MEDIUMuutils coreutils split Arbitrary File Truncation via Time-of-Check to Time-of-Use (TOCTOU)
CVE-2026-353606.3 MEDIUMuutils coreutils touch Arbitrary File Truncation via TOCTOU Race Condition
CVE-2026-353556.3 MEDIUMuutils coreutils install Arbitrary File Overwrite via Symlink TOCTOU Race
CVE-2026-353635.6 MEDIUMuutils coreutils rm Safeguard Bypass via Improper Path Normalization
CVE-2026-353695.5 MEDIUMuutils coreutils kill System-wide Process Termination and Denial of Service via Argument M
CVE-2026-353395.5 MEDIUMuutils coreutils chmod False Success Exit Code in Recursive Mode
CVE-2026-353805.5 MEDIUMuutils coreutils cut Local Logic Error and Data Integrity Issue in Delimiter Parsing
CVE-2026-353405.5 MEDIUMuutils coreutils chown and chgrp False Success Exit Code in Recursive Mode
CVE-2026-353485.5 MEDIUMuutils coreutils sort Local Denial of Service via Forced UTF-8 Parsing
CVE-2026-353455.3 MEDIUMuutils coreutils tail Privileged Information Disclosure via Symlink Replacement Race
CVE-2026-353725.0 MEDIUMuutils coreutils ln Security Bypass via Improper Handling of the --no-dereference Flag

Showing top 20 of 44 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: coreutils
Same vendor: Uutils
Same weakness: CWE-367

V. Comments for CVE-2026-35376

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