CVE intelligence and bounded remediation

CVE-2021-31612 — Zh-Jieli Ac6901 Firmware security vulnerability

Medium CVSS 6.5

The Bluetooth Classic implementation on Zhuhai Jieli AC690X devices does not properly handle the reception of an oversized LMP packet greater than 17 bytes during the LMP auto rate procedure, allowing attackers in radio range to trigger a deadlock via a crafted LMP packet.

Severity
Medium
CVSS
6.5 (3.1)
Published
2021-09-07
CISA KEV
Not currently listed
Ecosystem
operating-system

Affected products

  • zh-jieli / ac6901_firmware
  • zh-jieli / ac690n_firmware
  • zh-jieli / ac692n_firmware
  • zh-jieli / ac6902_firmware
  • zh-jieli / ac6903_firmware
  • zh-jieli / ac6905_firmware

Showing 6 representative product identities from 12 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

General vulnerability remediation

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Confirm the affected component, deployment paths, reachable interfaces, and enabled features from inventories and configuration, without probing production destructively.
  • Compare the advisory's affected conditions with the repository lockfiles, build manifests, artifacts, and runtime inventory.
  • Identify data sensitivity, trust boundaries, and privilege level for every confirmed affected deployment.

Remediate safely

  • Apply a vendor-supported fix or remove the affected component or feature; record the selected change and its source in the repository.
  • Update direct and transitive dependency locks, generated artifacts, deployment manifests, and asset inventories together.
  • Add a regression test for the documented unsafe condition using inert inputs and preserve rollback instructions.

Authoritative sources

Complete CVE record and remediation plan

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