CVE intelligence and bounded remediation

CVE-2021-1958 — Qualcomm Qca6574A Firmware security vulnerability

Medium CVSS 6.7

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

Severity
Medium
CVSS
6.7 (3.1)
Published
2021-09-09
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-362

Affected products

  • qualcomm / qca6574a_firmware
  • qualcomm / qca6574au_firmware
  • qualcomm / qca6595_firmware
  • qualcomm / qca6595au_firmware
  • qualcomm / qca6696_firmware
  • qualcomm / sa6145p_firmware

Showing 6 representative product identities from 38 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Race condition, TOCTOU, and lifecycle synchronization

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Check exposure

  • Map concurrent actors, shared state, lock boundaries, signals, callbacks, retries, and check-then-use sequences in the affected path.
  • Determine whether untrusted users can influence timing, object names, filesystem state, or repeated state transitions.
  • Identify clustered and multi-process behavior that repository-local tests may not represent.

Remediate safely

  • Make the sensitive state transition atomic or protect it with a consistently ordered synchronization primitive.
  • Perform authorization and invariant checks on the same authoritative object and transaction used for the operation.
  • Use unique private resources, safe ownership transfer, and idempotent operations; add deterministic concurrency regression tests.

Authoritative sources

Complete CVE record and remediation plan

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