Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Write-protecting of L2 SPTEs in TDP MMU when clearing dirty status Check kvmmmupageadneedwriteprotect when deciding whether to write-protect or clear D-bits on TDP MMU SPTEs. This ensures that the TDP MMU takes into...

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

In the Linux kernel, the following vulnerability has been resolved: x86/mm: Eliminate the window where the window in which TLB flushes may be inadvertently skipped. TL;DR: There is a window in the MM switching code where the new CR3 is set, and the CPU should receive TLB flushes for the new MM...

CVE-2026-23402 KVM: x86/mmu: Only WARN in direct MMUs when overwriting shadow-present SPTE

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Only WARN in direct MMUs when overwriting shadow-present SPTE Adjust KVM's sanity check against overwriting a shadow-present SPTE with a another SPTE with a different target PFN to only apply to direct MMUs, i.e. on...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2025-992665)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-992665 advisory. In the Linux kernel, the following vulnerability has been resolved: x86/mm: Fix flushtlbrange when used for zapping normal PMDs On the following path, flushtlbrange...

CVE-2025-40174

In the Linux kernel, the following vulnerability has been resolved: x86/mm: Fix SMP ordering in switchmmirqsoff Stephen noted that it is possible to not have an smpmb between the loadedmm store and the tlbgen load in switchmm, meaning the ordering against flushtlbmmrange goes out the window, and ...

CVE-2025-38071 x86/mm: Check return value from memblock_phys_alloc_range()

In the Linux kernel, the following vulnerability has been resolved: x86/mm: Check return value from memblockphysallocrange At least with CONFIGPHYSICALSTART=0x100000, if there is 4 MiB of contiguous free memory available at this point, the kernel will crash and burn because memblockphysallocrange...

CVE-2025-22090

In the Linux kernel, the following vulnerability has been resolved: x86/mm/pat: Fix VMPAT handling when fork fails in copypagerange If trackpfncopy fails, we already added the dst VMA to the maple tree. As fork fails, we'll cleanup the maple tree, and stumble over the dst VMA for which we neither...

kernel: KVM: x86/mmu: race condition in direct_page_fault()

A flaw was found in the Linux kernel in the KVM. A race condition in directpagefault allows guest OS users to cause a denial of service host OS crash or host OS memory corruption when nested virtualization and the TDP MMU are enabled...