Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pv: fix index value of replaced ASCE The index field of the struct page corresponding to a guest ASCE should be 0. When replacing the ASCE in s390replaceasce, the index of the new ASCE should also be set to 0. Using th...

Astra Linux – Vulnerability in open-vm-tools

VMware Tools contains a vulnerability related to bypassing the SAML token signature. A malicious actor who has been granted “Guest Operation Privileges” can potentially elevate their privileges if the target virtual machine has been assigned a more privileged “Guest Alias”. source-iocs-preserved...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic-v2: Check whether the vCPU is not NULL in vgicv2parseattr. vgicv2parseattr is responsible for finding the vCPU that matches the user-provided CPUID. This CPUID may, of course, be invalid. If the ID is invalid,...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Always use vmcb01 in the emulation of VMLOAD/VMSAVE. The commit cc3ed80ae69f states that “KVM: nSVM: always use vmcb01 for vmsave/vmload of guest state”. This commit ensured that KVM always used vmcb01 for the fields...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.10, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: using arrayindexnospec with indices that come from the guest min and destid are guest-controlled indices. Using arrayindexnospec after the bounds checks helps to mitigate speculative execution side-channels by clamping...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: making the apf token non-zero to fix the bug In the current async pagefault logic, when a page is ready, KVM relies on kvmarchcandequeuepagepresent to determine whether to deliver a READY event to the Guest. This...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Assign linearpitchalignment even for VM Description Assign linearpitchalignment to prevent division by zero errors in VM environments...

Astra Linux – Vulnerability in amd64-microcode

Improper or unexpected behavior of the INVD instruction in some AMD CPUs may allow an attacker with a malicious hypervisor to influence the cache line write-back behavior of the CPU, resulting in a potential loss of integrity of the guest virtual machine VM memory...

appsandbox v0.1.5

App Sandbox App Sandbox is a virtual machine app for Windows and macOS that's focused on performance and ease of use. Windows features: Works on Windows 11 Home or Pro, without Hyper-V Windows 11 or Ubuntu 26.04 LTS VM Support Zero touch install Copy and Paste 2 Channel Audio GPU Acceleration via...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: igb: Initialize the mailbox message for VF reset When a MAC address is not assigned to the VF, that portion of the message sent to the VF is not set. However, the memory is allocated from the stack, which means that information m...

Astra Linux – Vulnerability in Qemu

A flaw was discovered in the QEMU implementation of VMWare’s paravirtual RDMA device. The issue arises when handling the “PVRDMACMDCREATEMR” command due to improper memory remapping mremap. This flaw allows a malicious guest to crash the QEMU process on the host. The greatest threat posed by this...

Astra Linux – Vulnerability in Qemu

It was found that the patch for CVE-2020-17380/CVE-2020-25085 is ineffective. As a result, QEMU becomes vulnerable to out-of-bounds read/write access issues that were previously identified in the SDHCI controller emulation code. This flaw allows a malicious privileged attacker to crash the QEMU...

Astra Linux – Vulnerability in Qemu

A flaw was discovered in the QEMU-built-in VNC server during the processing of ClientCutText messages. A incorrect exit condition may lead to an infinite loop when inflating a zlib buffer controlled by an attacker in the inflatebuffer function. This could allow a remotely authenticated client, wh...

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: KVM: x86: Acquiring SRCU in KVMGETMPSTATE to protect guest memory accesses Acquiring a lock on kvm-srcu when userspace is obtaining the MP state can lead to a severe edge case where processing APIC events, such as during pending...

Astra Linux – Vulnerability in Linux

A flaw was discovered in the KVM’s AMD code, which handles SVM nested virtualization. The flaw occurs during the processing of the VMCB virtual machine control block provided by the L1 guest to spawn/handle a nested guest L2. Due to improper validation of the “virtext” field, this issue could all...

Astra Linux – Vulnerability in Linux 5.10, Linux, Linux 5.15

A flaw was discovered in KVM. When calling the KVMGETDEBUGREGS ioctl on 32-bit systems, there might be uninitialized portions of the kvm Debugregs structure that could be copied into user space, resulting in an information leak...

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 in OpenVSwitch

A flaw was discovered in Open vSwitch, allowing ICMPv6 Neighbor Advertisement packets between virtual machines to bypass OpenFlow rules. This issue may enable a local attacker to create specially crafted packets with a modified or spoofed target IP address field, which can redirect ICMPv6 traffic...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: KVM: Do not dereference ops-destroy with a null pointer. The cleanup of a KVM device occurs through either of two callbacks: 1 destroy, called when the VM is being destroyed; 2 release, called when a device file descriptor is...