What is CVE-2023-21630?

CVE-2023-21630 is a high-severity vulnerability in Qualcomm Qca6391, classified under Integer Underflow. CVSS score: 8.4/10. Published 2023-04-13.

How severe is CVE-2023-21630?

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

Integer overflow in Qualcomm Qca6391

CVE-2023-21630

Memory Corruption in Multimedia Framework due to integer overflow when synx bind is called along with synx signal.

Published 2023-04-13 · 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 (1.5th percentile), scored 2026-10-23.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 1.5% 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)

References

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

Frequently asked questions

What is CVE-2023-21630?: CVE-2023-21630 is a high-severity vulnerability in Qualcomm Qca6391, classified under Integer Underflow. CVSS score: 8.4/10. Published 2023-04-13.
How severe is CVE-2023-21630?: High severity. CVSS v3 base score is 8.4 out of 10.