CVE-2026-43241

CVEs › CVE-2026-43241

Description

In the Linux kernel, the following vulnerability has been resolved: ntb: ntb_hw_switchtec: Fix array-index-out-of-bounds access Number of MW LUTs depends on NTB configuration and can be set to MAX_MWS, This patch protects against invalid index out of bounds access to mw_sizes When invalid access print message to user that configuration is not valid.

Overview

State: PUBLISHED
Assigner (CNA): Linux
CVSS severity: high
CVSS score: 7.1 / 10
CVSS vector: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Effective score: 7.1 / 10 HIGH source: CNA overview
CWE(s): —
Reserved: 2026-05-01
Published: 2026-05-06 13:28 UTC
Last updated: 2026-05-12 00:20 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/43xxx/CVE-2026-43241.json
Linked Threat: CVE-2026-43241 — CVE-2026-43241

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.

EPSS score: 0.0001 (probability of exploitation in next 30 days)
EPSS percentile: 2.55% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24

NVD / KEV / EPSS data refreshed 2026-05-25 09:03 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-2026-27804
Assigner: Linux
Published: May 6, 2026, 11:28:34 AM
Updated: May 11, 2026, 10:20:44 PM
EUVD base score: 0.0 / 10
EUVD-reported EPSS: 0.0100
Vendors: Linux
Products: Linux (1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <740945de896021b9a859e71f38f6aea72a6393cf)

Linux (ec0467ccbdeb69a86c8729073057bda7bce00eec <2346856b74823a2a78109002e479a3d02526a9ce)

Linux (ec0467ccbdeb69a86c8729073057bda7bce00eec <740945de896021b9a859e71f38f6aea72a6393cf)

Linux (4.15)

Linux (patch: 5.10.252)

Linux (1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <348e1ac9ad983ed7e62de14e1daf47f1695a4ce9)

Linux (ec0467ccbdeb69a86c8729073057bda7bce00eec <85c9daa1f8319bbb3dfee71dc6a2f969cd3b4c92)

Linux (patch: 6.12.75)

Linux (patch: 6.19.6)

Linux (1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c8ba7ad2cc1c7b90570aa347b8ebbe279f1eface)

Linux (ec0467ccbdeb69a86c8729073057bda7bce00eec <47ce292dd45dc689747c40603222691638919189)

Linux (ec0467ccbdeb69a86c8729073057bda7bce00eec <0e930420945106151c6eb3d7837b4e6154e9b144)

Linux (patch: 6.6.128)

Linux (1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2346856b74823a2a78109002e479a3d02526a9ce)

Linux (ec0467ccbdeb69a86c8729073057bda7bce00eec <ee02c4f980c91820845dd8e469ec7dc670ab6d9d)

Linux (patch: 7.0)

Linux (1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <47ce292dd45dc689747c40603222691638919189)

Linux (ec0467ccbdeb69a86c8729073057bda7bce00eec <348e1ac9ad983ed7e62de14e1daf47f1695a4ce9)

Linux (patch: 5.15.202)

Linux (1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0e930420945106151c6eb3d7837b4e6154e9b144)

Linux (1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <85c9daa1f8319bbb3dfee71dc6a2f969cd3b4c92)

Linux (ec0467ccbdeb69a86c8729073057bda7bce00eec <c8ba7ad2cc1c7b90570aa347b8ebbe279f1eface)

Linux (1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ee02c4f980c91820845dd8e469ec7dc670ab6d9d)

Linux (patch: 6.18.16)

Linux (patch: 6.1.165)

Linux (patch: 0)

ENISA description: In the Linux kernel, the following vulnerability has been resolved: ntb: ntb_hw_switchtec: Fix array-index-out-of-bounds access Number of MW LUTs depends on NTB configuration and can be set to MAX_MWS, This patch protects against invalid index out of bounds access to mw_sizes When invalid access print message to user that configuration is not valid.

EUVD references (8)

Affected products (2)

Vendor	Product	Versions	Platforms
Linux	Linux	`ec0467ccbdeb69a86c8729073057bda7bce00eec` (affected), `ec0467ccbdeb69a86c8729073057bda7bce00eec` (affected), `ec0467ccbdeb69a86c8729073057bda7bce00eec` (affected), `ec0467ccbdeb69a86c8729073057bda7bce00eec` (affected), `ec0467ccbdeb69a86c8729073057bda7bce00eec` (affected), `ec0467ccbdeb69a86c8729073057bda7bce00eec` (affected), `ec0467ccbdeb69a86c8729073057bda7bce00eec` (affected), `ec0467ccbdeb69a86c8729073057bda7bce00eec` (affected)	—
Linux	Linux	`4.15` (affected), `0` (unaffected), `5.10.252` (unaffected), `5.15.202` (unaffected), `6.1.165` (unaffected), `6.6.128` (unaffected), `6.12.75` (unaffected), `6.18.16` (unaffected), `6.19.6` (unaffected), `7.0` (unaffected)	—

Vendor references (8)

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

MITRE references (8) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

Web references (6)

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

http://cwe.mitre.org/data/definitions/125.html rapid7:cwe.mitre.org
https://attackerkb.com/topics/CVE-2026-43241 rapid7:attackerkb.com
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-27804 rapid7:euvd.enisa.europa.eu
https://www.first.org/epss/ tenable:www.first.org
https://nvd.nist.gov/vuln/detail/CVE-2026-43241 tenable:nvd.nist.gov
https://www.cve.org/CVERecord?id=CVE-2026-43241 tenable:www.cve.org

Remediations (18)

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

Microsoft Patch Tuesday for May 2026 — Snort rules and prominent ...

web:blog.talosintelligence.com

Microsoft has released its monthly security update for May 2026 , which includes 137 vulnerabilities affecting a range of products, including 16 that Microsoft marked as "critical".

2026-05-23 21:12 UTC
CISA Warns of Exploited Microsoft Defender 0-Day Flaws

web:cyberpress.org

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two actively exploited Microsoft Defender vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, issuing an urgent remediation directive for federal agencies with a due date of June 3, 2026 .

2026-05-23 21:12 UTC
Microsoft Patch Tuesday March 2026 - 78 Vulnerabilities Fixed ...

web:cybersecuritynews.com

Microsoft released its March 2026 Patch Tuesday security update on March 10, 2026 , addressing 78 vulnerabilities across Windows, Microsoft Office, Azure, SQL Server, and .NET. The update includes one actively exploited zero-day vulnerability and multiple Critical-rated flaws demanding immediate attention from security teams. The most urgent fix this month is CVE - 2026 -21262, the sole zero-day ...

2026-05-23 21:12 UTC
Nvd - Cve-2026-41241

web:nvd.nist.gov

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

2026-05-23 21:12 UTC
Security Update Guide - Microsoft

web:portal.msrc.microsoft.com

The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

2026-05-23 21:12 UTC
CISA orders feds to patch BlueHammer flaw exploited as zero-day

web:www.bleepingcomputer.com

CISA has ordered U.S. federal agencies to patch a Microsoft Defender privilege escalation flaw (dubbed BlueHammer) that has been exploited in zero-day attacks.

2026-05-23 21:12 UTC
February's Patch Tuesday release fixes 59 flaws ... - Computerworld

web:www.computerworld.com

Each month, the team at Readiness analyzes the latest Patch Tuesday updates from Microsoft and provides detailed, actionable testing guidance. The company's Patch Tuesday release for February ...

2026-05-23 21:12 UTC
March 2026 Patch Tuesday: Updates and Analysis | CrowdStrike

web:www.crowdstrike.com

Microsoft's March 2026 Patch Tuesday addresses 82 CVEs , featuring eight Critical vulnerabilities.

2026-05-23 21:12 UTC
2 New Microsoft Defender Zero-Days Exploited—Patch Now ... - Forbes

web:www.forbes.com

Microsoft has confirmed an emergency security update as CISA warns that two new Defender zero-days are being exploited by attackers.

2026-05-23 21:12 UTC
April 2026 Microsoft Patch Tuesday | Tenable®

web:www.tenable.com

Microsoft patched 163 CVEs in April including two zero-day vulnerabilities in SharePoint and Microsoft Defender. CVE - 2026 -32201 was exploited in the wild.

2026-05-23 21:12 UTC
Windows Kerberos RC4 deprecation: what will break in Active ... - 4sysops

web:4sysops.com

Starting in April 2026 , Windows updates will change the default Kerberos ticket issuance behavior to AES-SHA1 for accounts without explicit encryption settings, while RC4 can still be used where explicitly enabled. This change, driven by CVE - 2026 -20833, affects every Windows Server environment where service accounts or devices still rely on RC4. Any service account, NAS device, or legacy ...

2026-05-26 02:46 UTC
Security Advisory Bulletin 064 | Ubiquiti Community

web:community.ui.com

Published: May 21, 2026 Updated: May 22, 2026 Version: 1.1 Revision: 1.1 Summary 1 of 5 A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection. Affected Products: UniFi OS Server (Version 5.0.6 and earlier) Mitigation : Update your UniFi OS Server to Version 5.0.8 or later ...

2026-05-26 02:46 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.

2026-05-26 02:46 UTC
Known Exploited Vulnerabilities Catalog - CISA

web:www.cisa.gov

For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild. Organizations should use the KEV catalog as an input to their vulnerability management prioritization framework.

2026-05-26 02:46 UTC
April 2026 Patch Tuesday: Updates and Analysis | CrowdStrike

web:www.crowdstrike.com

Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.

2026-05-26 02:46 UTC
CVE: Common Vulnerabilities and Exposures

web:www.cve.org

At cve .org, we provide the authoritative reference method for publicly known information-security vulnerabilities and exposures

2026-05-26 02:46 UTC
Resolving Sweet32, Birthday Attacks on Windows Servers Via GPO

web:www.experts-exchange.com

Learn more about Resolving Sweet32, Birthday Attacks on Windows Servers Via GPO from the expert community at Experts Exchange

2026-05-26 02:46 UTC
Oracle Critical Patch Update Advisory - April 2026

web:www.oracle.com

This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

2026-05-26 02:46 UTC

AI Forensic Analysis

Only Available for Registered Users. Sign in to view.

Raw JSON

The full cvelistV5 record. Download as CVE-2026-43241.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/ntb/hw/mscc/ntb_hw_switchtec.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "348e1ac9ad983ed7e62de14e1daf47f1695a4ce9",
              "status": "affected",
              "version": "ec0467ccbdeb69a86c8729073057bda7bce00eec",
              "versionType": "git"
            },
            {
              "lessThan": "ee02c4f980c91820845dd8e469ec7dc670ab6d9d",
              "status": "affected",
              "version": "ec0467ccbdeb69a86c8729073057bda7bce00eec",
              "versionType": "git"
            },
            {
              "lessThan": "740945de896021b9a859e71f38f6aea72a6393cf",
              "status": "affected",
              "version": "ec0467ccbdeb69a86c8729073057bda7bce00eec",
              "versionType": "git"
            },
            {
              "lessThan": "85c9daa1f8319bbb3dfee71dc6a2f969cd3b4c92",
              "status": "affected",
              "version": "ec0467ccbdeb69a86c8729073057bda7bce00eec",
              "versionType": "git"
            },
            {
              "lessThan": "0e930420945106151c6eb3d7837b4e6154e9b144",
              "status": "affected",
              "version": "ec0467ccbdeb69a86c8729073057bda7bce00eec",
              "versionType": "git"
            },
            {
              "lessThan": "2346856b74823a2a78109002e479a3d02526a9ce",
              "status": "affected",
              "version": "ec0467ccbdeb69a86c8729073057bda7bce00eec",
              "versionType": "git"
            },
            {
              "lessThan": "47ce292dd45dc689747c40603222691638919189",
              "status": "affected",
              "version": "ec0467ccbdeb69a86c8729073057bda7bce00eec",
              "versionType": "git"
            },
            {
              "lessThan": "c8ba7ad2cc1c7b90570aa347b8ebbe279f1eface",
              "status": "affected",
              "version": "ec0467ccbdeb69a86c8729073057bda7bce00eec",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/ntb/hw/mscc/ntb_hw_switchtec.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.15"
            },
            {
              "lessThan": "4.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.252",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.202",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.165",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.252",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.202",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.165",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.128",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.75",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.16",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.6",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nntb: ntb_hw_switchtec: Fix array-index-out-of-bounds access\n\nNumber of MW LUTs depends on NTB configuration and can be set to MAX_MWS,\nThis patch protects against invalid index out of bounds access to mw_sizes\nWhen invalid access print message to user that configuration is not valid."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:20:44.266Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/348e1ac9ad983ed7e62de14e1daf47f1695a4ce9"
        },
        {
          "url": "https://git.kernel.org/stable/c/ee02c4f980c91820845dd8e469ec7dc670ab6d9d"
        },
        {
          "url": "https://git.kernel.org/stable/c/740945de896021b9a859e71f38f6aea72a6393cf"
        },
        {
          "url": "https://git.kernel.org/stable/c/85c9daa1f8319bbb3dfee71dc6a2f969cd3b4c92"
        },
        {
          "url": "https://git.kernel.org/stable/c/0e930420945106151c6eb3d7837b4e6154e9b144"
        },
        {
          "url": "https://git.kernel.org/stable/c/2346856b74823a2a78109002e479a3d02526a9ce"
        },
        {
          "url": "https://git.kernel.org/stable/c/47ce292dd45dc689747c40603222691638919189"
        },
        {
          "url": "https://git.kernel.org/stable/c/c8ba7ad2cc1c7b90570aa347b8ebbe279f1eface"
        }
      ],
      "title": "ntb: ntb_hw_switchtec: Fix array-index-out-of-bounds access",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43241",
    "datePublished": "2026-05-06T11:28:34.927Z",
    "dateReserved": "2026-05-01T14:12:55.995Z",
    "dateUpdated": "2026-05-11T22:20:44.266Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}