What is CVE-2023-21672?

CVE-2023-21672 is a high-severity vulnerability in Qualcomm Fastconnect 6700, classified under Use After Free. CVSS score: 8.4/10. Published 2023-07-04.

How severe is CVE-2023-21672?

High severity. CVSS v3 base score is 8.4 out of 10.

Use After Free in Qualcomm Fastconnect 6700

CVE-2023-21672

Memory corruption in Audio while running concurrent tunnel playback or during concurrent audio tunnel recording sessions.

Vulnerability class: Use-After-Free

Published 2023-07-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (1.4th percentile), scored 2026-09-28.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-416 — Use After Free

References

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

Frequently asked questions

What is CVE-2023-21672?: CVE-2023-21672 is a high-severity vulnerability in Qualcomm Fastconnect 6700, classified under Use After Free. CVSS score: 8.4/10. Published 2023-07-04.
How severe is CVE-2023-21672?: High severity. CVSS v3 base score is 8.4 out of 10.