What is CVE-2023-21667?

CVE-2023-21667 is a medium-severity vulnerability in Qualcomm Qca6390, classified under Buffer Over-read. CVSS score: 6.5/10. Published 2023-09-05.

How severe is CVE-2023-21667?

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

Out-of-bounds Read in Qualcomm Qca6390

CVE-2023-21667

Transient DOS in Bluetooth HOST while passing descriptor to validate the blacklisted BT keyboard.

Published 2023-09-05 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.004 (28.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001

Affected products

Weakness classification (CWE)

References

www.qualcomm.com/company/product-security/bulletins/september-2023-bulletin (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2023-21667?: CVE-2023-21667 is a medium-severity vulnerability in Qualcomm Qca6390, classified under Buffer Over-read. CVSS score: 6.5/10. Published 2023-09-05.
How severe is CVE-2023-21667?: Medium severity. CVSS v3 base score is 6.5 out of 10.