HyperDeceit

HyperDeceit Este repositorio contiene el código fuente completo del proyecto HyperDeceit, que es una librería que te permite hacerte pasar por Hyper-V e interceptar las hiperllamadas realizadas por el kernel de Windows. Entrada del blog: https://reversing.info/posts/hyperdeceit/ Aviso legal El...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: x86/xen: Do not perform the PV iret hypercall through the hypercall page. Instead of jumping to the Xen hypercall page to execute the iret hypercall, the required sequence is directly coded in the xen-asm.S file. This action is...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Handle protected guests properly in completehypercallexit Use is64bithypercall instead of is64bitmode to detect a 64-bit hypercall when completing said hypercall. For guests with protected state, e.g., SEV-ES and SEV-SN...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: x86/hyperv: Disabling IBT when the hypercall page lacks the ENDBR instruction. On hardware that supports Indirect Branch Tracking IBT, Hyper-V VMs with ConfigVersion 9.3 or later support IBT in the guest. However, current version...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: Drivers: Virt: Acrn: Hsm: Use kzalloc to avoid information leakage in pmcmdioctl. In the “pmcmdioctl” function, three memory objects allocated by kmalloc are initialized using “hcallgetcpustate”. These objects are then copied to...

ALPINE-CVE-2026-62432

The EVTCHNOPexpandarray hypercall checks for whether FIFO event channels are enabled, but without holding the correct lock. It can race with EVTCHNOPreset, resulting in dereferencing a NULL pointer...

CVE-2026-62432

The EVTCHNOPexpandarray hypercall checks for whether FIFO event channels are enabled, but without holding the correct lock. It can race with EVTCHNOPreset, resulting in dereferencing a NULL pointer...

UBUNTU-CVE-2026-62432

The EVTCHNOPexpandarray hypercall checks for whether FIFO event channels are enabled, but without holding the correct lock. It can race with EVTCHNOPreset, resulting in dereferencing a NULL pointer...

CVE-2026-62433 correct buffer checks for DM_OP hypercalls

Parts of the DMOP handling code assumes the caller has provided the required number of buffers for the given operation without any checking being done. As a result, certain operations might access stack rubble as structures are possibly uninitialized...

CVE-2026-62432

The EVTCHNOPexpandarray hypercall checks for whether FIFO event channels are enabled, but without holding the correct lock. It can race with EVTCHNOPreset, resulting in dereferencing a NULL pointer...

CVE-2026-62432 evtchn: Race between FIFO expand and reset

The EVTCHNOPexpandarray hypercall checks for whether FIFO event channels are enabled, but without holding the correct lock. It can race with EVTCHNOPreset, resulting in dereferencing a NULL pointer...

CVE-2026-62432

The EVTCHNOPexpandarray hypercall checks for whether FIFO event channels are enabled, but without holding the correct lock. It can race with EVTCHNOPreset, resulting in dereferencing a NULL pointer...

CVE-2026-62432 evtchn: Race between FIFO expand and reset

The EVTCHNOPexpandarray hypercall checks for whether FIFO event channels are enabled, but without holding the correct lock. It can race with EVTCHNOPreset, resulting in dereferencing a NULL pointer...

PT-2026-65474

The EVTCHNOP expand array hypercall checks for whether FIFO event channels are enabled, but without holding the correct lock. It can race with EVTCHNOP reset, resulting in dereferencing a NULL pointer...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerabilities have been resolved: x86/vmware: Fixed hypercall clobbering issues Fedora QA reported the following panic: BUG: Unable to handle a page fault for address: 0000000040003e54 PF: Supervisor write access in kernel mode PF: Errorcode0x0002 – Not-presen...

Astra Linux – Vulnerability in Qemu

An “off-by-one” error was detected in QEMU’s KVM Xen guest support. A malicious guest could exploit this flaw to trigger out-of-bounds heap accesses in the QEMU process through the emulated Xen physdev hypercall interface, resulting in a denial of service or potential memory corruption...

KVM: x86: check for nEPT/nNPT in slow flush hypercalls

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SUSE CVE-2026-46076

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Raise UD if unhandled VMMCALL isn't intercepted by L1 Explicitly synthesize a UD for VMMCALL if L2 is active, L1 does NOT want to intercept VMMCALL, nestedsvml2tlbflushenabled is true, and the hypercall is something...

AZL-88614 CVE-2026-46076 affecting package kernel 6.6.150.1-1

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Raise UD if unhandled VMMCALL isn't intercepted by L1 Explicitly synthesize a UD for VMMCALL if L2 is active, L1 does NOT want to intercept VMMCALL, nestedsvml2tlbflushenabled is true, and the hypercall is something...

UBUNTU-CVE-2026-46076

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Raise UD if unhandled VMMCALL isn't intercepted by L1 Explicitly synthesize a UD for VMMCALL if L2 is active, L1 does NOT want to intercept VMMCALL, nestedsvml2tlbflushenabled is true, and the hypercall is something...