What is CVE-2021-35121?

CVE-2021-35121 is a medium-severity vulnerability in Qualcomm Apq8053, classified under Improper Validation of Array Index. CVSS score: 6.7/10. Published 2022-06-14.

How severe is CVE-2021-35121?

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

Vulnerability in Qualcomm Apq8053

CVE-2021-35121

An array index is improperly used to lock and unlock a mutex which can lead to a Use After Free condition In the Synx driver in Snapdragon Compute, Snapdragon Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile

Published 2022-06-14 · 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: 0.002 (3.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 3.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-129 — Improper Validation of Array Index

References

www.qualcomm.com/company/product-security/bulletins/june-2022-bulletin (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-35121?: CVE-2021-35121 is a medium-severity vulnerability in Qualcomm Apq8053, classified under Improper Validation of Array Index. CVSS score: 6.7/10. Published 2022-06-14.
How severe is CVE-2021-35121?: Medium severity. CVSS v3 base score is 6.7 out of 10.