AMD EPYC™ and AMD EPYC™ Embedded Series Processor Vulnerabilities – February 2026

CVE Details Refer to Glossary for explanation of terms CVE| CVE Description| CVSS Score| CVSS Vector ---|---|---|--- CVE-2025-52533| Improper access control in an on-chip debug interface could allow a privileged attacker to enable a debug interface and potentially compromise data confidentiality ...

StackWarp: Breaking AMD SEV-SNP Integrity via Deterministic Stack-Pointer Manipulation through the CPU's Stack Engine

In this paper, the authors present StackWarp, a software-based architectural attack exploiting the stack engine on AMD Zen CPUs to modify the stack pointer within an SEV-SNP guest, fully breaking integrity...

CVE-2025-29943

CVE-2025-29943 : AMD CPUs (Zen 1–Zen 5; EPYC) contain a hardware/microarchitectural issue where an admin-privileged host can manipulate the CPU pipeline configuration, potentially corrupting the stack pointer inside a SEV-SNP guest. A PoC titled “StackWarp” demonstrates exploitation by a hypervis...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: x86/kvm: Forces the legacy PCI hole to be mapped as UC when overriding MTRRs for TDX/SNP. When running as an SNP or TDX guest under KVM, the legacy PCI hole—that is, the memory between Top of Lower Usable DRAM and 4 GiB—is forced...

UBUNTU-CVE-2025-29934

A bug within some AMD CPUs could allow a local admin-privileged attacker to run a SEV-SNP guest using stale TLB entries, potentially resulting in loss of data integrity...

Linux Distros Unpatched Vulnerability : CVE-2025-40181

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - x86/kvm: Force legacy PCI hole to UC when overriding MTRRs for TDX/SNP When running as an SNP or TDX guest under KVM, force the legacy PCI hole, i.e. memory...

CVE-2025-40181

In the Linux kernel, the following vulnerability has been resolved: x86/kvm: Force legacy PCI hole to UC when overriding MTRRs for TDX/SNP When running as an SNP or TDX guest under KVM, force the legacy PCI hole, i.e. memory between Top of Lower Usable DRAM and 4GiB, to be mapped as UC via a forc...

CVE-2025-40181 x86/kvm: Force legacy PCI hole to UC when overriding MTRRs for TDX/SNP

In the Linux kernel, the following vulnerability has been resolved: x86/kvm: Force legacy PCI hole to UC when overriding MTRRs for TDX/SNP When running as an SNP or TDX guest under KVM, force the legacy PCI hole, i.e. memory between Top of Lower Usable DRAM and 4GiB, to be mapped as UC via a forc...

CVE-2025-40181 x86/kvm: Force legacy PCI hole to UC when overriding MTRRs for TDX/SNP

In the Linux kernel, the following vulnerability has been resolved: x86/kvm: Force legacy PCI hole to UC when overriding MTRRs for TDX/SNP When running as an SNP or TDX guest under KVM, force the legacy PCI hole, i.e. memory between Top of Lower Usable DRAM and 4GiB, to be mapped as UC via a forc...

CVE-2025-40181

In the Linux kernel, the following vulnerability has been resolved: x86/kvm: Force legacy PCI hole to UC when overriding MTRRs for TDX/SNP When running as an SNP or TDX guest under KVM, force the legacy PCI hole, i.e. memory between Top of Lower Usable DRAM and 4GiB, to be mapped as UC via a forc...

Stale Translation Lookaside Buffer (TLB) Entry Vulnerability

Summary An internally reported microcode bug in some EPYC™ AMD CPUs could allow a local admin-privileged attacker to run SEV-SNP Secure Encrypted Virtualization - Secure Nested Paging guests using stale TLB entries. This bug could allow SNP active vCPUs to reuse TLB entries from other virtual...

New TEE.Fail Side-Channel Attack Extracts Secrets from Intel and AMD DDR5 Secure Enclaves

A group of academic researchers from Georgia Tech, Purdue University, and Synkhronix have developed a side-channel attack called TEE.Fail that allows for the extraction of secrets from the trusted execution environment TEE in a computer's main processor, including Intel's Software Guard eXtension...

CVE-2025-0033

Improper access control within AMD SEV-SNP could allow an admin privileged attacker to write to the RMP during SNP initialization, potentially resulting in a loss of SEV-SNP guest memory integrity...

Physical Address Bit Leakage on AMD SEV-SNP Systems

Revisions Revision Date| Description ---|--- 2025-10-20| Initial publication...

CVE-2025-0033

Improper access control within AMD SEV-SNP could allow an admin privileged attacker to write to the RMP during SNP initialization, potentially resulting in a loss of SEV-SNP guest memory integrity...

RMPocalypse: Single 8-Byte Write Shatters AMD's SEV-SNP Confidential Computing

Chipmaker AMD has released fixes to address a security flaw dubbed RMPocalypse that could be exploited to undermine confidential computing guarantees provided by Secure Encrypted Virtualization with Secure Nested Paging SEV-SNP. The attack, per ETH Zürich researchers Benedict Schlüter and Shweta...

AMD CVE-2025-0033: RMP Corruption During SNP Initialization

Microsoft is aware of AMD-SB-3020 | CVE-2025-0033 disclosed by AMD on October 13, 2025. CVE-2025-0033 is a vulnerability in AMD EPYC processors using Secure Encrypted Virtualization – Secure Nested Paging SEV-SNP. It involves a race condition during Reverse Map Table RMP initialization that could...

PT-2025-41795

Name of the Vulnerable Software and Affected Versions AMD EPYC and EPYC Embedded series processors versions prior to BIOS updates from OEM partners AMD EPYC processors using Secure Encrypted Virtualization – Secure Nested Paging SEV-SNP affected versions not specified Description A critical issue...

EUVD-2021-13215

Malware in sbrugna...

New $50 Battering RAM Attack Breaks Intel and AMD Cloud Security Protections

A group of academics from KU Leuven and the University of Birmingham has demonstrated a new vulnerability called Battering RAM to bypass the latest defenses on Intel and AMD cloud processors. "We built a simple, $50 interposer that sits quietly in the memory path, behaving transparently during...