Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: mm: thp: Deny THP for files on anonymous inodes The filethpenabled function incorrectly allows THP for files on anonymous inodes e.g., guestmemfd and secretmem. These files are created using allocfilepseudo, which does not cal...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: x86/mm: Ensure that the input to pfntokaddr is treated as a 64-bit type. On 64-bit platforms, the pfntokaddr macro requires that the input value be 64 bits. This ensures that valid address bits are not lost when shifting the...

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 Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV – Lock all vCPUs when synchronizing VMSAs for SNP launches to complete. Lock all vCPUs when synchronizing and encrypting VMSAs for SNP guests. Allowing the user space to manipulate or run a vCPU while its state is being...

Astra Linux – Vulnerability in open-vm-tools

A fully compromised ESXi host can cause VMware Tools to fail in authenticating host-to-guest operations, thereby affecting the confidentiality and integrity of the guest virtual machine...

Astra Linux – Vulnerability in open-vm-tools

A malicious actor who has been granted “Guest Operation Privileges” https://docs.vmware.com/en/VMware-vSphere/8.0/vsphere-security/GUID-6A952214-0E5E-4CCF-9D2A-90948FF643EC.html can potentially elevate their privileges if the target virtual machine has been assigned a more privileged “Guest Alias...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Fixed the issue where the sevreceivestart command failed due to the absence of the sevdecommission command. The current SEV context must be decommissioned if binding an ASID fails after a RECEIVESTART operation. Accordi...

Astra Linux – Vulnerability in Linux

A flaw was discovered in the KVM’s AMD code, responsible for supporting SVM nested virtualization. The flaw occurs during the processing of the VMCB virtual machine control block provided by the L1 guest, which is used to spawn or handle a nested guest L2. Due to improper validation of the...

Astra Linux – Vulnerability in Qemu

A reachable assertion issue was detected in the USB EHCI emulation code of QEMU. This issue can occur during the processing of USB requests due to improper handling of the DMA memory map. A malicious privileged user within the guest environment may exploit this flaw to send invalid USB requests,...

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 Qemu

A out-of-bounds read flaw was discovered in the QXL display device emulation in QEMU. The qxlphys2virt function does not check the size of the structure pointed to by the guest physical address, potentially allowing it to read beyond the bounds of the bar space onto adjacent pages. A malicious...

Astra Linux – Vulnerability in Linux

The file “arch/powerpc/kvm/book3srtas.c” in the Linux kernel, as of version 5.13.5 on the powerpc platform, allows KVM guest OS users to cause memory corruption in the host OS through “rtasargs.nargs”, also known as CID-f62f3c20647e...

CVE-2026-23557

Any guest can cause xenstored to crash by issuing a XSRESETWATCHES command within a transaction due to an assert triggering. In case xenstored was built with NDEBUG defined nothing bad will happen, as assert is doing nothing in this case. Note that the default is not to define NDEBUG for xenstore...

ALPINE-CVE-2026-23558

The adjustments made for XSA-379 as well as those subsequently becoming XSA-387 still left a race window, when a HVM or PVH guest does a grant table version change from v2 to v1 in parallel with mapping the status pages via XENMEMaddtophysmap. Some of the status pages may then be freed while...

ALPINE-CVE-2026-23557

Any guest can cause xenstored to crash by issuing a XSRESETWATCHES command within a transaction due to an assert triggering. In case xenstored was built with NDEBUG defined nothing bad will happen, as assert is doing nothing in this case. Note that the default is not to define NDEBUG for xenstore...

CVE-2026-23558 grant table v2 race in status page mapping

The adjustments made for XSA-379 as well as those subsequently becoming XSA-387 still left a race window, when a HVM or PVH guest does a grant table version change from v2 to v1 in parallel with mapping the status pages via XENMEMaddtophysmap. Some of the status pages may then be freed while...

CVE-2026-23558

The adjustments made for XSA-379 as well as those subsequently becoming XSA-387 still left a race window, when a HVM or PVH guest does a grant table version change from v2 to v1 in parallel with mapping the status pages via XENMEMaddtophysmap. Some of the status pages may then be freed while...

EUVD-2026-30928

The adjustments made for XSA-379 as well as those subsequently becoming XSA-387 still left a race window, when a HVM or PVH guest does a grant table version change from v2 to v1 in parallel with mapping the status pages via XENMEMaddtophysmap. Some of the status pages may then be freed while...

CVE-2026-23558

The adjustments made for XSA-379 as well as those subsequently becoming XSA-387 still left a race window, when a HVM or PVH guest does a grant table version change from v2 to v1 in parallel with mapping the status pages via XENMEMaddtophysmap. Some of the status pages may then be freed while...

CVE-2026-23557 Xenstored DoS via XS_RESET_WATCHES command

Any guest can cause xenstored to crash by issuing a XSRESETWATCHES command within a transaction due to an assert triggering. In case xenstored was built with NDEBUG defined nothing bad will happen, as assert is doing nothing in this case. Note that the default is not to define NDEBUG for xenstore...