CVE intelligence and bounded remediation

CVE-2023-42483 — Samsung Exynos 9820 Firmware security vulnerability

Medium CVSS 6.3

A TOCTOU race condition in Samsung Mobile Processor Exynos 9820, Exynos 980, Exynos 1080, Exynos 2100, Exynos 2200, Exynos 1280, and Exynos 1380 can cause unexpected termination of a system.

Severity
Medium
CVSS
6.3 (3.1)
Published
2023-12-13
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-367

Affected products

  • samsung / exynos_9820_firmware
  • samsung / exynos_980_firmware
  • samsung / exynos_1080_firmware
  • samsung / exynos_2100_firmware
  • samsung / exynos_2200_firmware
  • samsung / exynos_1280_firmware

Showing 6 representative product identities from 7 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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