What is CVE-2021-30331?

CVE-2021-30331 is a medium-severity vulnerability in Qualcomm Ar8035, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.5/10. Published 2022-04-01.

How severe is CVE-2021-30331?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Qualcomm Ar8035

CVE-2021-30331

Possible buffer overflow due to improper data validation of external commands sent via DIAG interface in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Wearables

Vulnerability class: Buffer Overflow

Published 2022-04-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.001 (3.1th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.1% 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-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

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

Frequently asked questions

What is CVE-2021-30331?: CVE-2021-30331 is a medium-severity vulnerability in Qualcomm Ar8035, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.5/10. Published 2022-04-01.
How severe is CVE-2021-30331?: Medium severity. CVSS v3 base score is 5.5 out of 10.