What is CVE-2021-30343?

CVE-2021-30343 is a critical-severity vulnerability in Qualcomm Ar8035, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 9.1/10. Published 2022-06-14.

How severe is CVE-2021-30343?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Qualcomm Ar8035

CVE-2021-30343

Improper integrity check can lead to race condition between tasks PDCP and RRC? after a valid RRC Command packet has been received in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

Published 2022-06-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.005 (41.7th percentile), scored 2026-10-23.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.7% 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-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

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

Frequently asked questions

What is CVE-2021-30343?: CVE-2021-30343 is a critical-severity vulnerability in Qualcomm Ar8035, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 9.1/10. Published 2022-06-14.
How severe is CVE-2021-30343?: Critical severity. CVSS v3 base score is 9.1 out of 10.