cve-2023-20573-poc

PoC Usage This repo contains a VMM that boots an SEV-SNP guest with a custom kernel. The VMM and kernel are a stripped-down version of a project of mine. A modified Linux kernel is required to run on the host: https://github.com/Freax13/linux/tree/for-amd. The Proof of Concept can be run like thi...

SyscallRevenant

Surpassing EDRs & AVs SyscallRevenant SyscallRevenant is a new method of performing clean indirect syscalls. The main component resolves System Service Numbers SSNs and syscall instruction addresses dynamically. This is done by enabling the trap flag during execution. The secondary component is...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-001591)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-001591 advisory. A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flagTF bit in EFLAGS during emulation of the syscall instructio...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-002573)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-002573 advisory. A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flagTF bit in EFLAGS during emulation of the syscall instructio...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-002799)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-002799 advisory. A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flagTF bit in EFLAGS during emulation of the syscall instructio...

kernel: x86/bhi: Avoid warning in #DB handler due to BHI mitigation

A denial of service vulnerability was found in the Linux kernel. When BHI mitigation is enabled, if SYSENTER is invoked with the TF flag set, then entrySYSENTERcompat uses CLEARBRANCHHISTORY and calls the clearbhbloop before the TF flag is cleared. This causes the DB handler excdebugkernel to iss...

kernel: x86/bhi: Avoid warning in #DB handler due to BHI mitigation

A denial of service vulnerability was found in the Linux kernel. When BHI mitigation is enabled, if SYSENTER is invoked with the TF flag set, then entrySYSENTERcompat uses CLEARBRANCHHISTORY and calls the clearbhbloop before the TF flag is cleared. This causes the DB handler excdebugkernel to iss...

SUSE CVE-2024-42240

In the Linux kernel, the following vulnerability has been resolved: x86/bhi: Avoid warning in DB handler due to BHI mitigation When BHI mitigation is enabled, if SYSENTER is invoked with the TF flag set then entrySYSENTERcompat uses CLEARBRANCHHISTORY and calls the clearbhbloop before the TF flag...

AZL-47791 CVE-2024-42240 affecting package kernel for versions less than 5.15.167.1-1

In the Linux kernel, the following vulnerability has been resolved: x86/bhi: Avoid warning in DB handler due to BHI mitigation When BHI mitigation is enabled, if SYSENTER is invoked with the TF flag set then entrySYSENTERcompat uses CLEARBRANCHHISTORY and calls the clearbhbloop before the TF flag...

Linux Kernel Security Vulnerabilities

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from a problem with the x86/bhi module BHI mitigation mechanism when handling SYSENTER calls. When the TF flag bi...

SUSE CVE-2017-7518

A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flagTF bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exceptionDB being raised in the guest stack. A user/process inside a guest could use this flaw to...

EulerOS Virtualization 3.0.1.0 : kvm (EulerOS-SA-2019-1450)

According to the versions of the kvm package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - The msrmtrrvalid function in arch/x86/kvm/mtrr.c in the Linux kernel before 4.6.1 supports MSR 0x2f8, which allows guest OS users to...

Design/Logic Flaw

A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flagTF bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exceptionDB being raised in the guest stack. A user/process inside a guest could use this flaw to...

DEBIAN-CVE-2017-7518

A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flagTF bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exceptionDB being raised in the guest stack. A user/process inside a guest could use this flaw to...

CVE-2017-7518

A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flagTF bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exceptionDB being raised in the guest stack. A user/process inside a guest could use this flaw to...

CVE-2017-7518

A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flagTF bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exceptionDB being raised in the guest stack. A user/process inside a guest could use this flaw to...

CVE-2017-7518: Execution with Unnecessary Privileges

A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flagTF bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exceptionDB being raised in the guest stack. A user/process inside a guest could use this flaw to...

Kernel: KVM: debug exception via syscall emulation

A flaw was found in the way the Linux KVM module processed the trap flagTF bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exceptionDB being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate their privileges insi...

Kernel: KVM: debug exception via syscall emulation

A flaw was found in the way the Linux KVM module processed the trap flagTF bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exceptionDB being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate their privileges insi...

UBUNTU-CVE-2017-7518

A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flagTF bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exceptionDB being raised in the guest stack. A user/process inside a guest could use this flaw to...