Medium severity6.5NVD Advisory· Published Sep 7, 2021· Updated Jun 17, 2026
CVE-2021-31785
CVE-2021-31785
Description
The Bluetooth Classic implementation on Actions ATS2815 and ATS2819 chipsets does not properly handle the reception of multiple LMP_host_connection_req packets, allowing attackers in radio range to trigger a denial of service (deadlock) of the device via crafted LMP packets. Manual user intervention is required to restart the device and restore Bluetooth communication.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
7- Actions/ATS2815 and ATS2819 chipsetsdescription
- cpe:2.3:o:actions-semi:ats2819p_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:actions-semi:ats2815_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:actions-semi:ats2819_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:actions-semi:ats2819s_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:actions-semi:ats2819t_firmware:-:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
3- dl.packetstormsecurity.net/papers/general/braktooth.pdfnvdTechnical DescriptionThird Party Advisory
- launchstudio.bluetooth.com/ListingDetails/76427nvdThird Party Advisory
- www.actions-semi.com/index.phpnvdBroken LinkVendor Advisory
News mentions
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