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    CVE-2025-29943

    Write what were condition within AMD CPUs may allow an admin-privileged attacker to modify the configuration of the CPU pipeline potentially resulting in the corruption of the stack pointer inside an SEV-SNP guest.

    Published:Jan 16, 2026
    Last Modified:Apr 15, 2026
    EPS:Jan 16, 2026
    EPSS Score:0.00007
    CVSS Score:3.2

    Affected Products

    Vendor
    Amd
    Product
    Epyc
    Vendor
    Amd
    Product
    Epyc 8004
    Vendor
    Amd
    Product
    Epyc 9004
    Vendor
    Amd
    Product
    Epyc 9005
    Vendor
    Amd
    Product
    Epyc Embedded 7003
    Vendor
    Amd
    Product
    Epyc Embedded 9005

    Exploits

    https://github.com/fevar54/POC_CVE-2025-29943_Write-what-where-Condition

    Common Weakness Enumeration

    CWE-123 Write-what-where Condition

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2025-29934 (CVSS 5.3) — A bug within some AMD CPUs could allow a local admin-privileged attacker to run a SEV-SNP guest using stale TL…
    CVE-2025-0033 (CVSS 6) — Improper access control within AMD SEV-SNP could allow an admin privileged attacker to write to the RMP during…
    CVE-2025-0032 (CVSS 7.2) — Improper cleanup in AMD CPU microcode patch loading could allow an attacker with local administrator privilege…
    CVE-2024-36354 (CVSS 7.5) — Improper input validation for DIMM serial presence detect (SPD) metadata could allow an attacker with physical…
    CVE-2024-36331 (CVSS 3.2) — Improper initialization of CPU cache memory could allow a privileged attacker with hypervisor access to overwr…
    CVE-2023-31351 (CVSS 5.3) — Improper restriction of operations in the IOMMU could allow a malicious hypervisor to access guest private mem…
    CVE-2024-21977 (CVSS 3.2) — Incomplete cleanup after loading a CPU microcode patch may allow a privileged attacker to degrade the entropy …
    CVE-2024-21981 (CVSS 5.7) — Improper key usage control in AMD Secure Processor (ASP) may allow an attacker with local access who has gaine…
    CVE-2021-26318 (CVSS 4.7) — A timing and power-based side channel attack leveraging the x86 PREFETCH instructions on some AMD CPUs could p…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High