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CVE-2026-46131General(linux / linux_kernel)

LOWCVSS 5.5 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: check for nEPT/nNPT in slow flush hypercalls Checking is_guest_mode(vcpu) is incorrect, because translate_nested_gpa() is only valid if an L2 guest is running *with nested EPT/NPT enabled*. Instead use the same condition as translate_nested_gpa() itself.

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0.0/ 10 priority

Sources & remediation

Patch / fix

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • linux_kernel

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • General: 1 classified signal
  • 1 total mentions across 1 day

Affected systems

Vendors
linux
Products
linux_kernel

1 version affected across 1 product

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-05-29: 1Technical Details · 2026-05-29: 105-29
Signal classification1 categories
General
1100.0%
Referenced assets1 URL
Full discourse1 post
  • WindowsForum@windowsforum
    General

    🪟 Not a Windows CVE, but it’s the same sandbox glue: nested virtualization + Hyper-V TLB flush state. Translation: your “it runs fine” VM stack can still bite. Patch smart. #Windows #KVM #HyperV #Security https://windowsforum.com/threads/cve-2026-46131-fixing-linux-kvm-nested-ept-npt-hyper-v-tlb-flush-state-bug.420643/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #NestedVirtualization #LinuxKvm #Cve202646131 https://t.co/f66TG8WZtw

    Post summary

    The tweet highlights CVE-2026-46131, pointing out a nested virtualization flaw that can affect Hyper‑V TLB flush states, warns that a seemingly stable VM stack may still be vulnerable, and urges patching without providing any PoC or exploitation details.

    0000058
    1.1K followersView on X
CPE platform detail3 entries

3 of 3 entries

PartVendorProductVersionTarget SWTarget HW
OSlinuxlinux_kernel---
OSlinuxlinux_kernel7.1--
OSlinuxlinux_kernel7.1--

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