CVE-2021-31612
MEDIUM
6.5
CVSS Score
Published: September 7, 2021 at 06:32 AM UTC
Updated: June 17, 2026 at 03:52 AM UTC
24 products affected across 1 vendorAC6901 FirmwareAC692N FirmwareAC6904 Firmware
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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.5%
Description
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (3)
x_refsource_MISCProductVendor Advisory
Source: [email protected]
http://www.zh-jieli.com/product/68-cn.htmlx_refsource_MISCBroken Link
Source: [email protected]
https://dl.packetstormsecurity.net/papers/general/braktooth.pdfx_refsource_MISCThird Party Advisory
Source: [email protected]
https://launchstudio.bluetooth.com/ListingDetails/19746CVSS
- Attack Vector
- ADJACENT_NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
NVD-CWE-noinfo
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