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-2019-19196

Malware in sbrugna...

EUVD-2021-13212

Malware in sbrugna...

EUVD-2020-5246

Malware in sbrugna...

Unity Linux 20.1070e Security Update: kernel (UTSA-2025-414510)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-414510 advisory. A flaw was found in the Linux kernel. The existing KVM SEV API has a vulnerability that allows a non-root host user-level application to crash the host kernel by...

EUVD-2022-15379

Malicious code in bioql PyPI...

EUVD-2021-33979

Malicious code in bioql PyPI...

EUVD-2023-54035

Malicious code in bioql PyPI...

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...

SEV-SNP Physical Memory Aliasing

Summary Researchers have reported a method for privileged attackers with physical access to a motherboard to potentially compromise confidentiality and integrity of AMD Secure Encrypted Virtualization – Secure Nesting Paging SEV-SNP guests. AMD does not plan to release any mitigations in response...

CVE-2024-36331

Improper initialization of CPU cache memory could allow a privileged attacker with hypervisor access to overwrite SEV-SNP guest memory resulting in loss of data integrity...

CVE-2024-36331

Improper initialization of CPU cache memory could allow a privileged attacker with hypervisor access to overwrite SEV-SNP guest memory resulting in loss of data integrity...

CVE-2024-21977

CVE-2024-21977 describes an AMD SEV-SNP-related issue where incomplete cleanup after loading a CPU microcode patch may degrade RDRAND entropy, potentially impacting integrity for SEV-SNP guests. Connected sources confirm this affects AMD EPYC/SEV-SNP platform components (IOMMU, SEV-SNP) and note ...

CVE-2024-21977

Incomplete cleanup after loading a CPU microcode patch may allow a privileged attacker to degrade the entropy of the RDRAND instruction, potentially resulting in loss of integrity for SEV-SNP guests...

CVE-2025-38506

In the Linux kernel, the following vulnerability has been resolved: KVM: Allow CPU to reschedule while setting per-page memory attributes When running an SEV-SNP guest with a sufficiently large amount of memory 1TB+, the host can experience CPU soft lockups when running an operation in...

SEV Heap Buffer Overflow Info Disclosure

The vulnerability in the SEV microprogramming system of AMD graphics processors is related to incomplete cleanup of temporary or auxiliary resources. Exploiting this vulnerability can allow an attacker to gain access to confidential information...

CVE-2025-38506

In the Linux kernel, the following vulnerability has been resolved: KVM: Allow CPU to reschedule while setting per-page memory attributes When running an SEV-SNP guest with a sufficiently large amount of memory 1TB+, the host can experience CPU soft lockups when running an operation in...

CVE-2025-38508

In the Linux kernel, the following vulnerability has been resolved: x86/sev: Use TSCFACTOR for Secure TSC frequency calculation When using Secure TSC, the GUESTTSCFREQ MSR reports a frequency based on the nominal P0 frequency, which deviates slightly typically 0.2% from the actual mean TSC...