AMD Server Vulnerabilities – August 2025

Summary Potential vulnerabilities in AMD EPYC™ Processor platforms that affect IOMMU, AMD Secure Encrypted Virtualization – Secure Nested Paging SEV-SNP and other platform components, were found during audits performed internally and by third parties. Mitigations have been provided in AMD EPYC™...

PT-2025-32828 · Microsoft · Windows Hyper-V +1

Name of the Vulnerable Software and Affected Versions: Windows Hyper-V affected versions not specified Description: A numeric truncation error exists in Windows Hyper-V that may allow an authorized attacker to elevate privileges locally. Recommendations: At the moment, there is no information abo...

KB5063875: Windows 11 version 22H2 / Windows 11 version 23H2 Security Update (August 2025)

The remote Windows host is missing security update 5063875. It is, therefore, affected by multiple vulnerabilities - Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code over a network. CVE-2025-53766 - Missing synchronization in Windows Hyper-V allows an...

Linux Distros Unpatched Vulnerability : CVE-2017-12154

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - The preparevmcs02 function in arch/x86/kvm/vmx.c in the Linux kernel through 4.13.3 does not ensure that the CR8-load exiting and CR8-store exiting L0 vmcs02...

SEV Ciphertext Side Channel Attacks

Summary AMD has received reports from two research groups detailing methods by which a malicious hypervisor could potentially execute a side channel attack against a running secure encrypted virtualization – secure nested paging SEV-SNP guest. The first report, titled “Relocate + Vote: Exploiting...

Microsoft Hyper-V 安全漏洞

Microsoft Hyper-V is an application from Microsoft USA. A system hypervisor virtualization technology that enables desktop virtualization. A security vulnerability exists in Microsoft Hyper-V. An attacker exploiting this vulnerability could elevate privileges. The following products and versions...

Voltage Fault Injection on SEV Virtual Machines

Summary Researchers shared with AMD a report titled “Voltage Fault Injection on SEV-protected Virtual Machines.” The report noted a Voltage Fault Injection VFI attack targeting AMD EPYC™ 7272 CPUs running Secure Encrypted Virtualization SEV protected virtual machines VMs. Physical attacks such as...

Linux Distros Unpatched Vulnerability : CVE-2020-27673

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. Guest OS users can cause a denial of service host OS hang via a high...

Linux Distros Unpatched Vulnerability : CVE-2021-4093

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization-Encrypted State SEV-ES. A KVM guest using SEV-ES can trigger...

Oracle Linux 8 / 9 : Unbreakable Enterprise kernel (ELSA-2025-20520)

The remote Oracle Linux 8 / 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2025-20520 advisory. - perf: Fix perfeventvalidatesize lockdep splat Mark Rutland Orabug: 36261485 CVE-2023-6931 - perf: Fix perfeventvalidatesize Peter Zijlstra Orabu...

Linux Distros Unpatched Vulnerability : CVE-2020-2732

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some...

Linux Distros Unpatched Vulnerability : CVE-2022-45869

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A race condition in the x86 KVM subsystem in the Linux kernel through 6.1-rc6 allows guest OS users to cause a denial of service host OS crash or host OS memory...

Linux Distros Unpatched Vulnerability : CVE-2021-47228

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - x86/ioremap: Map EFI-reserved memory as encrypted for SEV Some drivers require memory that is marked as EFI boot services data. In order for this memory to not ...

Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2025-20521)

The remote Oracle Linux 7 / 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2025-20521 advisory. - perf: Fix perfeventvalidatesize lockdep splat Mark Rutland Orabug: 36261486 CVE-2023-6931 - perf: Fix perfeventvalidatesize Peter Zijlstra Orabu...

Linux Distros Unpatched Vulnerability : CVE-2024-21263

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization component: Core. Supported versions that are affected are Prior to 7.0.22 and prior t...

Unbreakable Enterprise kernel security update

5.15.0-311.185.9 - nfs: ignore SBRDONLY when remounting nfs Li Lingfeng Orabug: 37781252 5.15.0-311.185.8 - net/mlx5: Add poll-eq API to be used by ULP's Praveen Kumar Kannoju Orabug: 38182400 - net/rds: poll eq during user-reset Praveen Kumar Kannoju Orabug: 38189328 5.15.0-311.185.7 - perf: Fix...

Linux Distros Unpatched Vulnerability : CVE-2022-23042

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Linux PV device frontends vulnerable to attacks by backends This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilitie...

Linux Distros Unpatched Vulnerability : CVE-2018-10853

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilegeCP...

Linux Distros Unpatched Vulnerability : CVE-2024-35804

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Mark target gfn of emulated atomic instruction as dirty When emulating an atomic...

Linux Distros Unpatched Vulnerability : CVE-2025-21839

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - KVM: x86: Load DR6 with guest value only before entering .vcpurun loop Move the conditional loading of hardware DR6 with the guest's DR6 value out of the core...