{"id":"CVE-2026-42542","summary":"TDengine has an integer underflow in uvConnMayGetUserInfo() allows unauthenticated remote crash (DoS)","details":"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.","aliases":["GHSA-vg95-j2hf-hvjx"],"modified":"2026-07-08T08:13:48.838592108Z","published":"2026-06-10T20:32:38.985Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42542.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-191"]},"references":[{"type":"WEB","url":"https://github.com/taosdata/TDengine/releases/tag/ver-3.4.1.6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42542.json"},{"type":"ADVISORY","url":"https://github.com/taosdata/TDengine/security/advisories/GHSA-vg95-j2hf-hvjx"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42542"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/taosdata/tdengine","events":[{"introduced":"6e95fe58a4e69509bd36aacbbc052ab264526942"},{"fixed":"003e8a5f102f6ee24ada79e087bdbbea1442ca88"}],"database_specific":{"source":["AFFECTED_FIELD","CPE_RANGE","REFERENCES"],"extracted_events":[{"introduced":"3.4.0.0"},{"fixed":"3.4.1.6"}],"cpe":"cpe:2.3:a:tdengine:tdengine:*:*:*:*:*:*:*:*"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42542.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}