Linux Distros Unpatched Vulnerability : CVE-2023-53756

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - KVM: VMX: Fix crash due to uninitialized currentvmcs KVM enables 'Enlightened VMCS' and 'Enlightened MSR Bitmap' when running as a nested hypervisor on top of...

CVE-2023-53756

In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Fix crash due to uninitialized currentvmcs KVM enables 'Enlightened VMCS' and 'Enlightened MSR Bitmap' when running as a nested hypervisor on top of Hyper-V. When MSR bitmap is updated, evmcstouchmsrbitmap function uses...

UBUNTU-CVE-2023-53756

In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Fix crash due to uninitialized currentvmcs KVM enables 'Enlightened VMCS' and 'Enlightened MSR Bitmap' when running as a nested hypervisor on top of Hyper-V. When MSR bitmap is updated, evmcstouchmsrbitmap function uses...

CVE-2023-53756

Summary of CVE-2023-53756 (CVE-2023-53756) : The issue is in KVM with Intel VMX where MSR bitmap updates could use a per-CPU current_vmcs that may be uninitialized, allowing a NULL-dereference and potential crash on nested Hyper-V configurations. The root cause is the check for current_vmcs in ev...

CVE-2023-53756

In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Fix crash due to uninitialized currentvmcs KVM enables 'Enlightened VMCS' and 'Enlightened MSR Bitmap' when running as a nested hypervisor on top of Hyper-V. When MSR bitmap is updated, evmcstouchmsrbitmap function uses...

PT-2025-49486

In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Fix crash due to uninitialized current vmcs KVM enables 'Enlightened VMCS' and 'Enlightened MSR Bitmap' when running as a nested hypervisor on top of Hyper-V. When MSR bitmap is updated, evmcs touch msr bitmap function...

CVE-2025-48502

Improper input validation within AMD uprof can allow a local attacker to overwrite MSR registers, potentially resulting in crash or denial of service...

CVE-2025-48502

Improper input validation within AMD uprof can allow a local attacker to overwrite MSR registers, potentially resulting in crash or denial of service...

CVE-2025-48502: Improper Validation of Specified Index, Position, or Offset in Input

Improper input validation within AMD uprof can allow a local attacker to overwrite MSR registers, potentially resulting in crash or denial of service...

powerpc/rtas: Fix RTAS MSR[HV] handling for Cell

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SUSE CVE-2025-40122

In the Linux kernel, the following vulnerability has been resolved: perf/x86/intel: Fix IA32PMCxCFGB MSRs access error When running perffuzzer on PTL, sometimes the below "unchecked MSR access error" is seen when accessing IA32PMCxCFGB MSRs. 55.611268 unchecked MSR access error: WRMSR to 0x1986...

CVE-2025-40122

CVE-2025-40122 relates to the Linux kernel perf_x86/intel PMU and the IA32_PMC_x_CFG_B MSR access error observed on PTL. The issue arises when configuring ACR (auto counter reload) masks via perf events: an incorrect check in intel_pmu_acr_late_setup() lets an invalid ACR counter mask be written ...

CVE-2025-40122

In the Linux kernel, the following vulnerability has been resolved: perf/x86/intel: Fix IA32PMCxCFGB MSRs access error When running perffuzzer on PTL, sometimes the below "unchecked MSR access error" is seen when accessing IA32PMCxCFGB MSRs. 55.611268 unchecked MSR access error: WRMSR to 0x1986...

CVE-2025-40122 perf/x86/intel: Fix IA32_PMC_x_CFG_B MSRs access error

In the Linux kernel, the following vulnerability has been resolved: perf/x86/intel: Fix IA32PMCxCFGB MSRs access error When running perffuzzer on PTL, sometimes the below "unchecked MSR access error" is seen when accessing IA32PMCxCFGB MSRs. 55.611268 unchecked MSR access error: WRMSR to 0x1986...

Linux Distros Unpatched Vulnerability : CVE-2025-40122

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: perf/x86/intel: Fix IA32PMCxCFGB MSRs access error When running perffuzzer on PTL, sometimes...

CVE-2025-40122: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: perf/x86/intel: Fix IA32PMCxCFGB MSRs access error When running perffuzzer on PTL, sometimes the below "unchecked MSR access error" is seen when accessing IA32PMCxCFGB MSRs. 55.611268 unchecked MSR access error: WRMSR to 0x1986...

kernel: KVM: VMX: Bury Intel PT virtualization (guest/host mode) behind CONFIG_BROKEN

In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Bury Intel PT virtualization guest/host mode behind CONFIGBROKEN Hide KVM's ptmode module param behind CONFIGBROKEN, i.e. disable support for virtualizing Intel PT via guest/host mode unless BROKEN=y. There are myriad...

EUVD-2022-54667

In the Linux kernel, the following vulnerability has been resolved: perf/x86/intel/lbr: Fix unchecked MSR access error on HSW The fuzzer triggers the below trace. 7763.384369 unchecked MSR access error: WRMSR to 0x689 tried to write 0x1fffffff8101349e at rIP: 0xffffffff810704a4...

EUVD-2022-54789

In the Linux kernel, the following vulnerability has been resolved: powerpc/rtas: Keep MSRRI set when calling RTAS RTAS runs in real mode MSRDR and MSRIR unset and in 32-bit big endian mode MSRSF,LE unset. The change in MSR is done in enterrtas in a relatively complex way, since the MSR value cou...

UBUNTU-CVE-2023-53663

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Check instead of asserting on nested TSC scaling support Check for nested TSC scaling support on nested SVM VMRUN instead of asserting that TSC scaling is exposed to L1 if L1's MSRAMD64TSCRATIO has diverged from KVM's...