What is CVE-2021-1919?

CVE-2021-1919 is a critical-severity vulnerability in Qualcomm Apq8009, classified under Integer Underflow. CVSS score: 9.8/10. Published 2021-09-08.

How severe is CVE-2021-1919?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Integer overflow in Qualcomm Apq8009

CVE-2021-1919

Integer underflow can occur when the RTCP length is lesser than than the actual blocks present in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon IoT, Snapdragon Voice & Music, Snapdragon Wearables

Published 2021-09-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (54.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-191 — Integer Underflow

References

www.qualcomm.com/company/product-security/bulletins/august-2021-bulletin (Vendor Advisory)

Frequently asked questions

What is CVE-2021-1919?: CVE-2021-1919 is a critical-severity vulnerability in Qualcomm Apq8009, classified under Integer Underflow. CVSS score: 9.8/10. Published 2021-09-08.
How severe is CVE-2021-1919?: Critical severity. CVSS v3 base score is 9.8 out of 10.