{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-42542: TDengine has an integer underflow in uvConnMayGetUserInfo() allows unauthenticated remote crash (DoS)","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-42542","status":"final","version":"1","initial_release_date":"2026-06-10T20:32:38.985Z","current_release_date":"2026-06-11T16:15:17.741Z","revision_history":[{"date":"2026-06-10T20:32:38.985Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"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.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-42542 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-42542"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-42542"},{"category":"external","summary":"https://github.com/taosdata/TDengine/security/advisories/GHSA-vg95-j2hf-hvjx","url":"https://github.com/taosdata/TDengine/security/advisories/GHSA-vg95-j2hf-hvjx"},{"category":"external","summary":"https://github.com/taosdata/TDengine/releases/tag/ver-3.4.1.6","url":"https://github.com/taosdata/TDengine/releases/tag/ver-3.4.1.6"}]},"product_tree":{"branches":[{"category":"vendor","name":"taosdata","branches":[{"category":"product_name","name":"TDengine","branches":[{"category":"product_version","name":">= 3.4.0.0, < 3.4.1.6","product":{"name":"taosdata TDengine >= 3.4.0.0, < 3.4.1.6","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:taosdata:tdengine:\\>\\=_3.4.0.0\\,_\\<_3.4.1.6:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-42542","title":"TDengine has an integer underflow in uvConnMayGetUserInfo() allows unauthenticated remote crash (DoS)","notes":[{"category":"description","text":"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.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH"},"products":["CSAFPID-1"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1"]}]}]}