CVE-2026-35347— uutils coreutils comm Silent Data Loss or Denial of Service via Improper Input Validation
Quick assessment
Affected
Uutils coreutils
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
uutils coreutils是Uutils开源的一个跨平台核心命令行工具集。 uutils coreutils存在输入验证错误漏洞，该漏洞源于comm实用程序在执行比较操作之前错误地从非常规文件输入中消耗数据，are_files_identical函数打开并读取两个输入路径以比较内容，而未首先验证路径是否引用常规文件，如果输入路径是FIFO或管道，此预读操作会耗尽流，导致在实际比较逻辑执行之前静默数据丢失，此外，如果尝试从无限流预读，实用程序可能无限期挂起。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1499 · Endpoint Denial of Service
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-35347
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
uutils coreutils comm Silent Data Loss or Denial of Service via Improper Input Validation
Source: CVE Program / CVE List V5
Vulnerability Description
The comm utility in uutils coreutils incorrectly consumes data from non-regular file inputs before performing comparison operations. The are_files_identical function opens and reads from both input paths to compare content without first verifying if the paths refer to regular files. If an input path is a FIFO or a pipe, this pre-read operation drains the stream, leading to silent data loss before the actual comparison logic is executed. Additionally, the utility may hang indefinitely if it attempts to pre-read from infinite streams like /dev/zero.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
uutils coreutils 输入验证错误漏洞
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存在输入验证错误漏洞，该漏洞源于comm实用程序在执行比较操作之前错误地从非常规文件输入中消耗数据，are_files_identical函数打开并读取两个输入路径以比较内容，而未首先验证路径是否引用常规文件，如果输入路径是FIFO或管道，此预读操作会耗尽流，导致在实际比较逻辑执行之前静默数据丢失，此外，如果尝试从无限流预读，实用程序可能无限期挂起。
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
II. Public POCs for CVE-2026-35347
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-35347
请登录查看更多情报信息。
Same Patch Batch · Uutils · 2026-04-22 · 44 CVEs total
| CVE-2026-35338 | 7.3 HIGH | uutils coreutils chmod Path Traversal Bypass of --preserve-root |
| CVE-2026-35368 | 7.2 HIGH | uutils coreutils chroot Local Privilege Escalation and chroot Escape in via Name Service S |
| CVE-2026-35341 | 7.1 HIGH | uutils coreutils mkfifo Unauthorized Permission Change on Existing Files |
| CVE-2026-35352 | 7.0 HIGH | uutils coreutils mkfifo Privilege Escalation via TOCTOU Race Condition |
| CVE-2026-35349 | 6.7 MEDIUM | uutils coreutils Path-Based Safety Bypass with --preserve-root |
| CVE-2026-35350 | 6.6 MEDIUM | uutils coreutils cp Unexpected Privileged Executable Creation with -p |
| CVE-2026-35365 | 6.6 MEDIUM | uutils coreutils mv Denial of Service and Data Duplication via Improper Symlink Expansion |
| CVE-2026-35356 | 6.3 MEDIUM | uutils coreutils install Arbitrary File Overwrite with -D via Path Component Symlink Race |
| CVE-2026-35364 | 6.3 MEDIUM | uutils coreutils mv Arbitrary File Overwrite via Cross-Device TOCTOU Race Condition |
| CVE-2026-35374 | 6.3 MEDIUM | uutils coreutils split Arbitrary File Truncation via Time-of-Check to Time-of-Use (TOCTOU) |
| CVE-2026-35360 | 6.3 MEDIUM | uutils coreutils touch Arbitrary File Truncation via TOCTOU Race Condition |
| CVE-2026-35355 | 6.3 MEDIUM | uutils coreutils install Arbitrary File Overwrite via Symlink TOCTOU Race |
| CVE-2026-35363 | 5.6 MEDIUM | uutils coreutils rm Safeguard Bypass via Improper Path Normalization |
| CVE-2026-35369 | 5.5 MEDIUM | uutils coreutils kill System-wide Process Termination and Denial of Service via Argument M |
| CVE-2026-35339 | 5.5 MEDIUM | uutils coreutils chmod False Success Exit Code in Recursive Mode |
| CVE-2026-35380 | 5.5 MEDIUM | uutils coreutils cut Local Logic Error and Data Integrity Issue in Delimiter Parsing |
| CVE-2026-35340 | 5.5 MEDIUM | uutils coreutils chown and chgrp False Success Exit Code in Recursive Mode |
| CVE-2026-35348 | 5.5 MEDIUM | uutils coreutils sort Local Denial of Service via Forced UTF-8 Parsing |
| CVE-2026-35345 | 5.3 MEDIUM | uutils coreutils tail Privileged Information Disclosure via Symlink Replacement Race |
| CVE-2026-35372 | 5.0 MEDIUM | uutils 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
-
CVE-2026-93658
uutils coreutils 0.0.18 before 0.10.0 Privilege Escalation v -
CVE-2026-56392
Heap-based Buffer Overflow in GNU coreutils -
CVE-2026-56391
Out‑of‑bounds Read in GNU coreutils -
CVE-2026-35381
uutils coreutils cut Local Logic Error and Data Integrity Is -
CVE-2026-35380
uutils coreutils cut Local Logic Error and Data Integrity Is
Same vendor: Uutils
-
CVE-2026-93658
uutils coreutils 0.0.18 before 0.10.0 Privilege Escalation v -
CVE-2026-35381
uutils coreutils cut Local Logic Error and Data Integrity Is -
CVE-2026-35380
uutils coreutils cut Local Logic Error and Data Integrity Is -
CVE-2026-35379
uutils coreutils tr Local Logic Error and Data Integrity Iss -
CVE-2026-35378
uutils coreutils expr Local Denial of Service via Eager Eval
V. Comments for CVE-2026-35347
No comments yet