What is CVE-2021-1958?

CVE-2021-1958 is a medium-severity vulnerability in Qualcomm Qca6574a, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 6.7/10. Published 2021-09-09.

How severe is CVE-2021-1958?

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

Vulnerability in Qualcomm Qca6574a

CVE-2021-1958

A race condition in fastrpc kernel driver for dynamic process creation can lead to use after free scenario in Snapdragon Auto, Snapdragon Connectivity, Snapdragon Mobile, Snapdragon Wearables

Vulnerability class: Race Condition

Published 2021-09-09 · 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: 0.001 (1.0th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.0% 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-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

References

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

Frequently asked questions

What is CVE-2021-1958?: CVE-2021-1958 is a medium-severity vulnerability in Qualcomm Qca6574a, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 6.7/10. Published 2021-09-09.
How severe is CVE-2021-1958?: Medium severity. CVSS v3 base score is 6.7 out of 10.