What is CVE-2023-21638?

CVE-2023-21638 is a medium-severity vulnerability in Qualcomm Aqt1000, classified under Incorrect Type Conversion or Cast. CVSS score: 6.7/10. Published 2023-07-04.

How severe is CVE-2023-21638?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Vulnerability in Qualcomm Aqt1000

CVE-2023-21638

Memory corruption in Video while calling APIs with different instance ID than the one received in initialization.

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

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (1.4th percentile), scored 2026-09-29.

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-704 — Incorrect Type Conversion or Cast

References

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

Frequently asked questions

What is CVE-2023-21638?: CVE-2023-21638 is a medium-severity vulnerability in Qualcomm Aqt1000, classified under Incorrect Type Conversion or Cast. CVSS score: 6.7/10. Published 2023-07-04.
How severe is CVE-2023-21638?: Medium severity. CVSS v3 base score is 6.7 out of 10.