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CVE-2026-46131

📛 CVE Title

KVM: x86: check for nEPT/nNPT in slow flush hypercalls

⬇ Download JSON ⚠ View as Threat

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.

Overview

State
PUBLISHED
Assigner (CNA)
Linux
CVSS severity
high
CVSS score
CVSS 7.1 / 10 7.1 7.1 / 10
CVSS vector
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Effective score
7.1 / 10 HIGH source: CNA overview
MSRC score
5.5 / 10 MEDIUM MS rating: Moderate
CWE(s)
—
Reserved
2026-05-13
Published
2026-05-28 09:35 UTC
Last updated
2026-05-28 09:35 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/46xxx/CVE-2026-46131.json
Linked Threat
CVE-2026-46131 — CVE-2026-46131

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published
2026-05-28 10:16:28 UTC
NVD last modified
2026-06-24 17:52:24 UTC
NVD CVSS v3.1
CVSS 5.5 / 10 5.5 5.5 / 10 MEDIUM source: nvd@nist.gov
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Exploitability subscore
1.8 / 10
Impact subscore
3.6 / 10
EPSS score
0.0013 (probability of exploitation in next 30 days)
EPSS percentile
2.78% vs all CVEs — higher = more likely to be exploited, as of 2026-08-01

NVD / KEV / EPSS data refreshed 2026-08-01 17:03 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID
EUVD-2026-32890
Assigner
Linux
Published
May 28, 2026, 9:35:46 AM
Updated
Jun 14, 2026, 5:56:46 PM
EUVD base score
0.0 / 10
EUVD-reported EPSS
0.1300
Vendors
Linux
Products
Linux (aee738236dca0d0870789138ec494e15d6303566 <971f17f5d91045404e3914029ea57c3da90179a4)
Linux (6.2)
Linux (patch: 6.12.88)
Linux (aee738236dca0d0870789138ec494e15d6303566 <d6f4e217d663ede5becc2fd6cb612c749677387b)
Linux (patch: 7.0.7)
Linux (patch: 7.1)
Linux (patch: 0)
Linux (aee738236dca0d0870789138ec494e15d6303566 <45fc766bc756ff1d66f8ca026a9c4f7f764adfae)
Linux (patch: 6.6.140)
Linux (aee738236dca0d0870789138ec494e15d6303566 <4c7f8436b19a2a3acc0cb6b6e3becd6796ae5c57)
Linux (patch: 6.18.30)
Linux (aee738236dca0d0870789138ec494e15d6303566 <464af6fc2b1dcc74005b7f58ee3812b17777efee)
Aliases
GHSA-3wqm-qqw5-qr42

ENISA 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.

EUVD references (5)

Microsoft Security Response Center MSRC

Microsoft's vendor-authoritative record from the Security Update Guide — its own CVSS score, impact, severity rating, exploit assessment, and KB-article fixes. Refreshed 2026-08-12 01:09 UTC (source: CVRF).

MS severity
Moderate
MS CVSS base score
5.5 / 10 (temporal 5.1)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U
Release
2026-May
Microsoft remediations / KB articles (2)

Affected products (2)
VendorProductVersionsPlatforms
Linux Linux aee738236dca0d0870789138ec494e15d6303566 (affected), aee738236dca0d0870789138ec494e15d6303566 (affected), aee738236dca0d0870789138ec494e15d6303566 (affected), aee738236dca0d0870789138ec494e15d6303566 (affected), aee738236dca0d0870789138ec494e15d6303566 (affected) —
Linux Linux 6.2 (affected), 0 (unaffected), 6.6.140 (unaffected), 6.12.88 (unaffected), 6.18.30 (unaffected), 7.0.7 (unaffected), 7.1-rc3 (unaffected) —

Affected products — CPE 2.3 (3) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*

Vendor references (5)

References embedded in the original CVE record by the assigning CNA.

Web references (10)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

NVD-tagged references (5)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

Remediations (20)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

  • Microsoft and Adobe Patch Tuesday, May 2026 Security Update Review
    web:blog.qualys.com

    May 2026's Patch Tuesday arrives with Microsoft addressing a fresh set of vulnerabilities across its ecosystem, reinforcing the ongoing need for timely patching in an increasingly threat-heavy…

    2026-06-04 00:01 UTC
  • Security Update Guide - Microsoft
    web:msrc.microsoft.com

    The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.

    2026-06-04 00:01 UTC
  • Nvd - Cve-2026-4631
    web:nvd.nist.gov

    An official website of the United States government Here's how you know

    2026-06-04 00:01 UTC
  • Vulnerability Remediation vs Mitigation: Which Strategy Wins in ...
    web:securityboulevard.com

    Cybersecurity vulnerabilities pose significant risks to organizations in today's digital landscape. Left unaddressed, these vulnerabilities can lead to data breaches, financial losses, and reputational damage. Organizations must decide how to tackle vulnerabilities—through remediation , mitigation , or a combination of both. But which strategy is more effective? This blog explores the ...

    2026-06-04 00:01 UTC
  • About the security content of Background Security Improvements for iOS ...
    web:support.apple.com

    This document describes the content of Background Security Improvements.

    2026-06-04 00:01 UTC
  • Vulnerability Mitigation vs. Remediation: What Is the Difference?
    web:virsec.com

    In one of them, mitigation is a form of remediation . In another, it's a contrasting concept. However, the distinction between vulnerability mitigation and remediation is not just semantic; it's operational. Remediation offers a definitive, long-term vulnerability fix , but its time and resource demands make it insufficient on its own.

    2026-06-04 00:01 UTC
  • A guide to vulnerability remediation vs mitigation | @Bugcrowd
    web:www.bugcrowd.com

    Vulnerability mitigation is typically considered a temporary or interim solution. While mitigation measures can reduce the immediate risk associated with vulnerabilities, they may not provide a permanent fix . Organizations should aim to prioritize and plan for complete vulnerability remediation whenever feasible and allocate resources accordingly.

    2026-06-04 00:01 UTC
  • Vulnerability Remediation vs. Mitigation: What are the Differences ...
    web:www.secure.com

    Remediation fully removes a vulnerability by fixing its root cause — through a patch , code fix , or system replacement. Mitigation reduces the risk of exploitation without removing the flaw itself, using controls like network segmentation or access restrictions.

    2026-06-04 00:01 UTC
  • Vulnerability Remediation vs Mitigation: Which is Best?
    web:www.strongboxit.com

    Learn the key differences between vulnerability remediation vs mitigation in cybersecurity. Discover which method is effective for protecting your data.

    2026-06-04 00:01 UTC
  • Strategies for Improving Mitigation & Remediation - Vuln Management ...
    web:www.zafran.io

    Mitigation is the control implemented or the action taken to reduce the impact or likelihood of a vulnerability or exposure being exploited before a fix is available or applied. Remediation is the resolution of the vulnerability or exposure which is completed typically through applying patches, updates, or correcting misconfigurations.

    2026-06-04 00:01 UTC
  • Pennsylvania Access To Criminal History - Home - pa
    web:epatch.pa.gov

    Why does PATCH exist? Its purpose is to better enable the public to obtain criminal history record checks. The repository was created and is maintained in accordance with Pennsylvania's Criminal History Information Act contained in Chapter 91 of Title 18, Crimes Code. This Act also directs the Pennsylvania State Police (PSP) to disseminate criminal history data to criminal justice agencies ...

    2026-06-19 02:28 UTC
  • GitHub - rootsecdev/cve_2026_31431: Exploit POC for CVE_2026_31431 · GitHub
    web:github.com

    Exploit POC for CVE_2026_31431. Contribute to rootsecdev/cve_2026_31431 development by creating an account on GitHub.

    2026-06-19 02:28 UTC
  • Critical Security Vulnerabilities Alert: Latest CVE Updates and Patch ...
    web:hackerdesk.com

    Critical Security Vulnerabilities Alert: Latest CVE Updates and Patch Management Strategies for April 2026 This report details critical security vulnerabilities disclosed in April 2026 , including severe flaws in Fortinet, FileZen, and Microsoft products. Organizations are urged to prioritize patching based on risk assessment and leverage compensating controls to mitigate immediate threats ...

    2026-06-19 02:28 UTC
  • Security Update Guide - Microsoft Security Response Center
    web:msrc.microsoft.com

    Security Update Guide - Microsoft Security Response Center

    2026-06-19 02:28 UTC
  • NVD - Home
    web:nvd.nist.gov

    The NVD is the U.S. government repository of standards based vulnerability management data represented using the Security Content Automation Protocol (SCAP). This data enables automation of vulnerability management, security measurement, and compliance. The NVD includes databases of security checklist references, security-related software flaws, product names, and impact metrics. For ...

    2026-06-19 02:28 UTC
  • Windows 11 KB5094126 Issues: BSOD, BitLocker, & OneDrive - WinCentral
    web:thewincentral.com

    Windows 11 cumulative update KB5094126 is causing severe BSOD 0xc0430001 boot loops, BitLocker lockouts, and broken OneDrive apps. Learn how to fix it now. - Read in Windows Issues on WinCentral

    2026-06-19 02:28 UTC
  • Microsoft Patch Tuesday, April 2026 Security Update Review
    web:threatprotect.qualys.com

    Zero-day Vulnerabilities Patched in April Patch Tuesday Edition CVE - 2026 -33825: Microsoft Defender Elevation of Privilege Vulnerability Microsoft Defender is a comprehensive, AI-powered security suite that provides malware protection, phishing detection, and web protection for individuals and businesses.

    2026-06-19 02:28 UTC
  • Windows 11 KB5094126 Issues: Fix BSOD, Black Screen & Boot Errors
    web:windows101tricks.com

    Fix 1: Uninstall KB5094126 from Windows Recovery If your PC started showing a black screen, BSOD, or boot errors immediately after installing KB5094126, removing the update is the first thing you should try. Windows Recovery Environment (WinRE) lets you uninstall the latest quality update even if Windows won't start normally. Here's how:

    2026-06-19 02:28 UTC
  • Microsoft working on a fix for RoguePlanet, a flaw that grants full PC ...
    web:www.malwarebytes.com

    Microsoft says it's working on a fix for an unpatched Defender vulnerability that can give attackers the highest level of access on Windows.

    2026-06-19 02:28 UTC
  • Oracle Critical Patch Update Advisory - April 2026
    web:www.oracle.com

    Oracle Critical Patch Update Advisory - April 2026 Description A Critical Patch Update is a collection of patches for multiple security vulnerabilities. These patches address vulnerabilities in Oracle code and in third party components included in Oracle products. These patches are usually cumulative, but each advisory describes only the security patches added since the previous Critical Patch ...

    2026-06-19 02:28 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-46131.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kvm/hyperv.c"
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          "versions": [
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              "status": "affected",
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
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            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
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              "status": "unaffected",
              "version": "6.18.30",
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            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.7",
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            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1-rc3",
              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: check for nEPT/nNPT in slow flush hypercalls\n\nChecking is_guest_mode(vcpu) is incorrect, because translate_nested_gpa()\nis only valid if an L2 guest is running *with nested EPT/NPT enabled*.\nInstead use the same condition as translate_nested_gpa() itself."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-28T09:35:46.220Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "cveId": "CVE-2026-46131",
    "datePublished": "2026-05-28T09:35:46.220Z",
    "dateReserved": "2026-05-13T15:03:33.099Z",
    "dateUpdated": "2026-05-28T09:35:46.220Z",
    "state": "PUBLISHED"
  },
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}