Astra Linux – Vulnerability in Qemu

A flaw was discovered in the QEMU implementation of VMWare’s paravirtual RDMA device. This flaw allows a malicious guest driver to execute hardware commands when shared buffers have not yet been allocated, potentially leading to a use-after-free condition...

Astra Linux – Vulnerability in Qemu

A use-after-free vulnerability was discovered in the am53c974 SCSI host bus adapter emulation in QEMU in versions prior to 6.0.0, during the handling of the ‘Information Transfer’ command CMDTI. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial ...

Astra Linux – Vulnerability in Qemu

A flaw was discovered in the QXL display device emulation in QEMU. The double retrieval of the guest-controlled values cursor-header.width and cursor-header.height can lead to the allocation of a small cursor object, followed by a subsequent heap-based buffer overflow. A malicious privileged gues...

Astra Linux – Vulnerability in Chromium

The use of “after free” in the Guest View of Google Chrome before version 113.0.5672.126 allowed an attacker who convinced a user to install a malicious extension to potentially exploit heap corruption through a crafted HTML page. Chromium security severity: High...

Astra Linux – Vulnerability in amd64-microcode

Improper signature verification in the AMD CPU ROM microcode patch loader may allow an attacker with local administrator privileges to load malicious CPU microcode, resulting in a loss of confidentiality and integrity for confidential guests running under AMD SEV-SNP...

Astra Linux – Vulnerability found in Linux 5.15, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: cxl: fixed a possible null-ptr-deref in cxlguestinitafu|adapter. If deviceregister fails in cxlregisterafu|adapter, the device is not added. In this case, deviceunregister cannot be called in the error path. Otherwise, a...

Astra Linux – Vulnerability in Qemu

A stack overflow vulnerability was discovered in the Intel HD Audio device intel-hda of QEMU. A malicious guest could exploit this flaw to crash the QEMU process on the host, resulting in a denial of service condition. The greatest threat posed by this vulnerability is to system availability. Thi...

Astra Linux – Vulnerability in Qemu

A out-of-bounds heap buffer access issue was identified in the ARM Generic Interrupt Controller emulator of QEMU, as of and including qemu 4.2.0 on the aarch64 platform. The issue arises because, when writing an interrupt ID to the controller’s memory area, it is not masked to be 4 bits wide. Thi...

Astra Linux – Vulnerability in libvirt

qemu/qemudriver.c in libvirt before version 6.0.0 improperly handles the handling of a monitor job during a query to a guest agent. This allows attackers to cause a denial of service API blockage...

Astra Linux – Vulnerability in Linux 6.1

A flaw was discovered in KVM. An improper check in svmsetx2apicmsrinterception may allow direct access to the host’s x2apic MSRs when the guest resets its APIC, potentially leading to a denial-of-service condition...

Astra Linux – Vulnerability in Linux 5.10, Linux

A flaw was discovered in KVM. When updating a guest’s page table entry, vmpgoff was incorrectly used as the offset to obtain the page’s pfn. Since vaddr and vmpgoff are controllable by user-mode processes, this flaw allows unprivileged local users on the host to write outside the userspace region...

Astra Linux – Vulnerability in virglrenderer

A NULL pointer dereferencing in the vrendrenderer.c file of virglrenderer during versions 0.8.0 allows guest OS users to cause a denial of service due to malformed commands...

Astra Linux – Vulnerability in Chromium

The use of “after free” in the Guest View of Google Chrome before version 114.0.5735.198 allowed an attacker who convinced a user to install a malicious extension to potentially exploit heap corruption through a crafted HTML page. Chromium security severity: High...

Astra Linux – Vulnerability in Linux 6.1

Improper initialization of the CPU cache memory could allow a privileged attacker with access to the hypervisor to overwrite the SEV-SNP guest memory, resulting in loss of data integrity...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: The existing SPTE is dropped/zapped even when creating an MMIO SPTE. When installing an emulated MMIO SPTE, do so after dropping/zapping the existing SPTE if it’s shadow-present. While the commit a54aa15c6bda3 was...

Astra Linux – Vulnerability in virglrenderer

A heap-based buffer overflow in the vrendrenderertransferwriteiov function in vrendrenderer.c in virglrenderer from version 0.8.0 allows guest OS users to cause a denial of service, or a QEMU guest-to-host escape and code execution, through VIRGLCCMDRESOURCEINLINEWRITE commands...

Astra Linux – Vulnerability in Linux

The fix for XSA-365 includes the initialization of pointers so that subsequent cleanup code would not use uninitialized or stale values. However, this initialization went too far and may, under certain conditions, also overwrite pointers that need to be cleaned up. The lack of cleanup would resul...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Zap all roots when unmapping gfn range in TDP MMU Both valid and invalid roots are cleared when unmapping a gfn range. KVM must ensure that it does not hold any references to the freed page after the unmapping...

Astra Linux – Vulnerability in amd64-microcode

IOMMU improperly handles certain special address ranges with invalid device table entries DTEs. This may allow an attacker with privileges and a compromised Hypervisor to induce DTE faults to bypass RMP checks in SEV-SNP, potentially resulting in a loss of guest integrity...

Astra Linux – Vulnerability in Linux 5.15

A flaw was discovered in KVM AMD Secure Encrypted Virtualization SEV within the Linux kernel. A KVM guest that uses SEV-ES or SEV-SNP with multiple vCPUs can trigger a double fetch race condition vulnerability and invoke the VMGEXIT handler recursively. If an attacker manages to call the handler...