CVE intelligence and bounded remediation

CVE-2021-25395 — Samsung Mobile Devices Race Condition Vulnerability

Medium CVSS 6.4 CISA KEV

A race condition in MFC charger driver prior to SMR MAY-2021 Release 1 allows local attackers to bypass signature check given a radio privilege is compromised.

Severity
Medium
CVSS
6.4 (3.1)
Published
2021-06-11
CISA KEV
Known exploited
Ecosystem
operating-system
Weaknesses
CWE-362

Affected products

  • samsung / android / 8.1
  • samsung / android / 9.0
  • samsung / android / 10.0
  • samsung / android / 11.0

Showing 4 representative product identities from 12 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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