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...

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...

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...

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...

CLSA-2024-1720468480 kernel: Fix of 101 CVEs

kvm: initialize all of the kvmdebugregs structure before sending it to userspace CVE-2023-1513 - wifi: mac80211: fix MBSSID parsing use-after-free CVE-2022-42719 - mac80211: always allocate struct ieee80211elems CVE-2022-42719 - netfilter: nftables: initialize registers in nftdochain...

Linux Kernel Security Vulnerabilities

The Linux kernel version 5.4 contains a security vulnerability. This vulnerability arises from KVM x86 failing to re-hang the GETNESTEDSTATEPAGES request before exiting user space when attempting to obtain nested pages. As a result, KVM may use an expired and unstable PFN to re-enter L2, and the...

Linux Kernel Security Vulnerabilities

The Linux kernel version 6.6 contains security vulnerabilities. These vulnerabilities stem from the KVM x86/mmu failing to terminate the traversal of shadow page tables immediately when the root is invalid or dummy root. When memslot creation competes with L2’s stage-2 page errors, the shadow pag...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Fixed an issue where shadow paging used after-free operations occurred due to unexpected GFN calculations. The shadow MMU calculates GFNs for direct shadow pages using sp-gfn plus the SPTE index. This assumption fails...

Moderate: Red Hat Security Advisory: kernel security update

An update for kernel is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for...

RHEL 7 : kernel (RHSA-2026:78844)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:78844 advisory. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: KVM: x86: Don't recheck L1 intercepts...

SUSE SLES16 Security Update : kernel (Live Patch 15 for SUSE Linux Enterprise 16) (SUSE-SU-2026:23951-1)

The remote SUSE Linux SLES16 / SLESSAP16 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:23951-1 advisory. This update for the SUSE Linux Enterprise Kernel 6.12.0-160000.36.1 fixes various security issues: The following security issues...

Rocky Linux 9 [CIQ] Security Update: kernel / kernel-64k / kernel-64k-core / kernel-64k-debug / etc Multiple Vulnerabilities (crlsa-2026_36957)

The Rocky Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-202636957 advisory. kernel: net/sched: ets: Always remove class from active list before deleting in etsqdiscchange CVE-2025-71066 kernel: KVM: x86: Fix shadow paging...

ROS-20260930-73-0022

The vulnerability in the arch/x86/kvm/x86.c module and arch/x86/kernel/fpu/core.c modules of the Linux operating system is related to synchronization errors when using shared resources. Exploiting this vulnerability can allow an attacker to cause a service failure...

SUSE SLES15 Security Update : kernel (Live Patch 19 for SUSE Linux Enterprise 15 SP7) (SUSE-SU-2026:4383-1)

The remote SUSE Linux SLES15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4383-1 advisory. This update for the SUSE Linux Enterprise Kernel 6.4.0-150700.53.73 fixes various security issues: The following security issues were fixed: -...

SUSE-SU-2026:23951-1 Security update for the Linux Kernel (Live Patch 15 for SUSE Linux Enterprise 16)

This update for the SUSE Linux Enterprise Kernel 6.12.0-160000.36.1 fixes various security issues: The following security issues were fixed: - CVE-2026-64423: ipv4: igmp: remove multicast group from hash table on device destruction bsc1275458. - CVE-2026-64561: KVM: x86: Check for invalid/obsolet...

SUSE-SU-2026:23968-1 Security update for the Linux Kernel (Live Patch 15 for SUSE Linux Enterprise 16)

This update for the SUSE Linux Enterprise Kernel 6.12.0-160000.36.1 fixes various security issues: The following security issues were fixed: - CVE-2026-64423: ipv4: igmp: remove multicast group from hash table on device destruction bsc1275458. - CVE-2026-64561: KVM: x86: Check for invalid/obsolet...

Security update for the Linux Kernel (Live Patch 19 for SUSE Linux Enterprise 15 SP7)

This update for the SUSE Linux Enterprise Kernel 6.4.0-150700.53.73 fixes various security issues: The following security issues were fixed: CVE-2026-64423: ipv4: igmp: remove multicast group from hash table on device destruction bsc1275458. CVE-2026-64561: KVM: x86: Check for invalid/obsolete ro...

SUSE-SU-2026:4383-1 Security update for the Linux Kernel (Live Patch 19 for SUSE Linux Enterprise 15 SP7)

This update for the SUSE Linux Enterprise Kernel 6.4.0-150700.53.73 fixes various security issues: The following security issues were fixed: - CVE-2026-64423: ipv4: igmp: remove multicast group from hash table on device destruction bsc1275458. - CVE-2026-64561: KVM: x86: Check for invalid/obsolet...

Security update for the Linux Kernel (Live Patch 43 for SUSE Linux Enterprise 15 SP5)

This update for the SUSE Linux Enterprise Kernel 5.14.21-150500.55.177 fixes various security issues: The following security issues were fixed: CVE-2026-64423: ipv4: igmp: remove multicast group from hash table on device destruction bsc1275458. CVE-2026-64561: KVM: x86: Check for invalid/obsolete...