Januscape

Januscape: Guest-to-Host Escape in KVM/x86 Abstract This document describes the Januscape CVE-2026-53359 vulnerability discovered and reported by Hyunwoo Kim @v4bel. It is a KVM escape vulnerability that lets a guest escape to the host in a KVM/x86 environment. To the best of public knowledge, th...

CVE-2026-53359-Kernel-Fix

中文 | English 中文 升级 Linux Kernel 7.1.3 修复 CVE-2026-53359 教程 声明： 本文仅记录本人服务器环境下的修复过程，并非安全专业分析。如有不当之处，欢迎指正。 验证说明： 经源码比对确认，Linux Kernel 7.1.3 已包含修复 commit 81ccda30b4e8（"KVM: x86: Fix shadow paging use-after-free due to unexpected role"），该补丁在 arch/x86/kvm/mmu/mmu.c 的 kvmmmugetchildsp 函数中增加了 role.word...

januscape

Januscape — Linux KVM/x86 guest-to-host escape tracking site Source for the Januscape patch-status tracker: a single-page site recording which distributions have shipped a fix for the KVM/x86 guest-to-host escape in the Linux kernel. Where the facts live Everything about the bug — CVE IDs, affect...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-053262)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-053262 advisory. In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Use scratch field in MMIO fragment to hold small write values When exiting to userspace...

Oracle Linux 8 / 9 : Unbreakable Enterprise kernel (ELSA-2026-500249)

The remote Oracle Linux 8 / 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-500249 advisory. - inet: frags: strip GSO state from fragments before reassembly Xinyang Ge Orabug: 39974835 CVE-2026-80590 - KVM: x86/mmu: Stop needlessly making...

UBUNTU-CVE-2026-80726

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: WARN and clear role.invalid when creating a child shadow page Explicitly clear role.invalid when deriving a child shadow page's role from its parent to harden against bugs elsewhere in KVM, as violating KVM's...

CVE-2026-80726

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: WARN and clear role.invalid when creating a child shadow page Explicitly clear role.invalid when deriving a child shadow page's role from its parent to harden against bugs elsewhere in KVM, as violating KVM's...

Zapscape

The KVM Escape Trilogy ITScape CVE‑2026‑46316 | Januscape CVE‑2026‑53359 | Zapscape CVE‑2026‑64561 ---|---|--- Zapscape: Guest-to-Host Escape in KVM/x86 Abstract This document describes the Zapscape CVE-2026-64561 vulnerability discovered and reported by Hyunwoo Kim @v4bel. It is a KVM escape...

AZL-99062 CVE-2026-80726 affecting package kernel 6.6.150.1-1

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: WARN and clear role.invalid when creating a child shadow page Explicitly clear role.invalid when deriving a child shadow page's role from its parent to harden against bugs elsewhere in KVM, as violating KVM's...

EUVD-2026-70330

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: WARN and clear role.invalid when creating a child shadow page Explicitly clear role.invalid when deriving a child shadow page's role from its parent to harden against bugs elsewhere in KVM, as violating KVM's...

CVE-2026-80726 KVM: x86/mmu: WARN and clear role.invalid when creating a child shadow page

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: WARN and clear role.invalid when creating a child shadow page Explicitly clear role.invalid when deriving a child shadow page's role from its parent to harden against bugs elsewhere in KVM, as violating KVM's...

Zapscape-Fix

Zapscape-Fix — CVE-2026-64561 Kernel Live Patch KVM/x86 English |简体中文 A kernel live patch that fixes CVE-2026-64561 Zapscape on CentOS Stream 8 / RHEL 8 KVM hosts all 4.18.0- kernels. Without the patch : a tenant VM guest can escape to the host with guest-side actions alone and execute code with...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098882)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098882 advisory. In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Fix shadow paging use-after-free due to unexpected role Commit 0cb2af2ea66ad KVM: x86:...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098768)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098768 advisory. In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Don't recheck L1 intercepts when completing userspace I/O When completing emulation of...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098759)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098759 advisory. In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Fix VM hard lockup after prolonged inactivity with periodic HV timer When advancing the...

kernel: KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O

A flaw was found in the Kernel-based Virtual Machine KVM for x86. This vulnerability occurs when KVM incorrectly re-checks Level 1 L1 intercepts during the completion of userspace I/O emulation for a Level 2 L2 instruction. If the L1 or host userspace modifies I/O interception settings during thi...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Warns when a triple fault assertion never “escapes” from L2 The warnings are removed because they perform a sanity check that ensures KVM never allows a triple fault in L2 to escape and end up in L1. In normal operation...

CVE-2026-74517

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Cancel delayed I/O APIC EOI handling before destroying vCPUs Cancel and flush the I/O APIC's delayed EOI handling work during the "pre VM destroy" phase, before vCPUs are destroyed, as processing the EOI broadcast will...

CVE-2026-72283

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Nullify irqfd-producer if updating IRTE for bypass fails Nullify irqfd-producer if updating the IRTE for bypass fails, as leaving a dangling pointer will result in a use-after-free if the irqfd is reachable through KVM'...

CVE-2026-72284

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Ignore pending PV EOI if the vCPU has since disabled PV EOIs Ignore KVM's internal "service pending PV EOI" request if the vCPU has disabled PV EOIs since the request was made. Asserting that PV EOIs are enabled can fai...