{"cve":"CVE-2021-31613","nvd":{"published":"2021-09-07T06:15:07.577","modified":"2026-06-17T03:52:04.967","status":"Modified","description":"The Bluetooth Classic implementation on Zhuhai Jieli AC690X and AC692X devices does not properly handle the reception of a truncated LMP packet during the LMP auto rate procedure, allowing attackers in radio range to immediately crash (and restart) a device via a crafted LMP packet.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":6.5},"cwes":[],"references":["http://www.zh-jieli.com/product/68-cn.html","https://dl.packetstormsecurity.net/papers/general/braktooth.pdf","https://launchstudio.bluetooth.com/ListingDetails/19746","https://launchstudio.bluetooth.com/ListingDetails/58628","http://www.zh-jieli.com/product/68-cn.html"],"products":["zh-jieli:ac6901_firmware","zh-jieli:ac6921_firmware","zh-jieli:ac6925_firmware","zh-jieli:ac6926_firmware","zh-jieli:ac6928_firmware"],"source":"nvd","synced_at":"2026-10-19T21:21:57.125947417+00:00"},"epss":{"cve":"CVE-2021-31613","score":0.00575,"percentile":0.47467,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}