CVE-2026-42542— TDengine has an integer underflow in uvConnMayGetUserInfo() allows unauthenticated remote crash (DoS)
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-42542
Vulnerability Information
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Vulnerability Title
TDengine has an integer underflow in uvConnMayGetUserInfo() allows unauthenticated remote crash (DoS)
Source: NVD (National Vulnerability Database)
Vulnerability Description
TDengine is an open source, time-series database optimized for Internet of Things devices. In versions 3.4.0.0 through 3.4.1.5, an unauthenticated remote attacker can crash the taosd server process by sending a single crafted RPC packet. No credentials or prior session state are required. Version 3.4.1.6 fixes the issue.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
整数下溢(超界折返)
Source: NVD (National Vulnerability Database)
Vulnerability Title
TDengine 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TDengine是TDengine公司的一款开源、高性能、云原生时间序列数据库。 TDengine 3.4.0.0版本至3.4.1.5版本存在数字错误漏洞，该漏洞源于未经验证的远程攻击者发送单个特制RPC数据包，可能导致taosd服务器进程崩溃。
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-2026-42542
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Vendor Advisories for CVE-2026-42542 (1)
Vendor Pages for CVE-2026-42542 (1)
- 🔗 Release 3.4.1.6 · taosdata/TDengine · GitHubx_refsource_MISC
IV. Related Vulnerabilities
Same weakness: CWE-191
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Krb5: krb5: integer underflow in berval2tl_data() leads to h - CVE-2026-42981
Windows Performance Monitor Remote Code Execution Vulnerabil - CVE-2026-42980
NT OS Kernel Elevation of Privilege Vulnerability
V. Comments for CVE-2026-42542
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