What is CVE-2021-1904?

CVE-2021-1904 is a medium-severity vulnerability in Qualcomm Apq8009, classified under Incorrect Comparison. CVSS score: 6.2/10. Published 2021-09-08.

How severe is CVE-2021-1904?

Medium severity. CVSS v3 base score is 6.2 out of 10.

Vulnerability in Qualcomm Apq8009

CVE-2021-1904

Child process can leak information from parent process due to numeric pids are getting compared and these pid can be reused in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon Wearables

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

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.005 (40.7th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-697 — Incorrect Comparison

References

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

Frequently asked questions

What is CVE-2021-1904?: CVE-2021-1904 is a medium-severity vulnerability in Qualcomm Apq8009, classified under Incorrect Comparison. CVSS score: 6.2/10. Published 2021-09-08.
How severe is CVE-2021-1904?: Medium severity. CVSS v3 base score is 6.2 out of 10.