CVE intelligence and bounded remediation

CVE-2023-20523 — Amd Epyc 7H12 Firmware security vulnerability

Medium CVSS 5.7

TOCTOU in the ASP may allow a physical attacker to write beyond the buffer bounds, potentially leading to a loss of integrity or denial of service.

Severity
Medium
CVSS
5.7 (3.1)
Published
2023-01-11
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-367

Affected products

  • amd / epyc_7h12_firmware
  • amd / epyc_7f72_firmware
  • amd / epyc_7f52_firmware
  • amd / epyc_7f32_firmware
  • amd / epyc_7742_firmware
  • amd / epyc_7702p_firmware

Showing 6 representative product identities from 50 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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