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CVE-2025-38518 – AMD Cyan Skillfish CPUID Information Disclosure

The following table lists the changes that have been made to the
CVE-2025-38518 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 16, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved:

    x86/CPU/AMD: Disable INVLPGB on Zen2

    AMD Cyan Skillfish (Family 17h, Model 47h, Stepping 0h) has an issue
    that causes system oopses and panics when performing TLB flush using
    INVLPGB.

    However, the problem is that that machine has misconfigured CPUID and
    should not report the INVLPGB bit in the first place. So zap the
    kernel’s representation of the flag so that nothing gets confused.

    [ bp: Massage. ]
    Added Reference https://git.kernel.org/stable/c/357f121517924e3ec3021f9d0dd0189adcd09867
    Added Reference https://git.kernel.org/stable/c/a74bb5f202dabddfea96abc1328fcedae8aa140a
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