What is CVE-2021-31785?

CVE-2021-31785 is a medium-severity vulnerability in Actions-Semi Ats2815, classified under Improper Locking. CVSS score: 6.5/10. Published 2021-09-07.

How severe is CVE-2021-31785?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2021-31785 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Actions-Semi Ats2815

CVE-2021-31785

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.

EPSS: 0.004 (36.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

CWE-667 — Improper Locking

Public proof-of-concept exploits

References

cve@mitre.org (x_refsource_MISC, Broken Link, Vendor Advisory)
cve@mitre.org (Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Technical Description, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-31785?: CVE-2021-31785 is a medium-severity vulnerability in Actions-Semi Ats2815, classified under Improper Locking. CVSS score: 6.5/10. Published 2021-09-07.
How severe is CVE-2021-31785?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2021-31785 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.