CVE-2026-43205

CVEs › CVE-2026-43205

Description

In the Linux kernel, the following vulnerability has been resolved: dpaa2-switch: validate num_ifs to prevent out-of-bounds write The driver obtains sw_attr.num_ifs from firmware via dpsw_get_attributes() but never validates it against DPSW_MAX_IF (64). This value controls iteration in dpaa2_switch_fdb_get_flood_cfg(), which writes port indices into the fixed-size cfg->if_id[DPSW_MAX_IF] array. When firmware reports num_ifs >= 64, the loop can write past the array bounds. Add a bound check for num_ifs in dpaa2_switch_init(). dpaa2_switch_fdb_get_flood_cfg() appends the control interface (port num_ifs) after all matched ports. When num_ifs == DPSW_MAX_IF and all ports match the flood filter, the loop fills all 64 slots and the control interface write overflows by one entry. The check uses >= because num_ifs == DPSW_MAX_IF is also functionally broken. build_if_id_bitmap() silently drops any ID >= 64: if (id[i] < DPSW_MAX_IF) bmap[id[i] / 64] |= ...

Overview

State: PUBLISHED
Assigner (CNA): Linux
CVSS severity: high
CVSS score: 7.8 / 10
CVSS vector: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Effective score: 7.8 / 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-2026-43205.json
Linked Threat: CVE-2026-43205 — CVE-2026-43205

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: 2026-05-06 12:16:39 UTC
NVD last modified: 2026-05-11 19:59:54 UTC
NVD CVSS v3.1: 7.8 / 10 HIGH source: nvd@nist.gov
NVD CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitability subscore: 1.8 / 10
Impact subscore: 5.9 / 10
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-assigned CWE(s): CWE-787 (differs from the CNA list above)

NVD / KEV / EPSS data refreshed 2026-05-25 09:04 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-2026-27768
Assigner: Linux
Published: May 6, 2026, 11:28:10 AM
Updated: May 11, 2026, 10:20:00 PM
EUVD base score: 0.0 / 10
EUVD-reported EPSS: 0.0100
Vendors: Linux
Products: Linux (539dda3c5d190c5088b5e57944b1b482fcb464de <8b841fd529db9faf8bc678d429d4bf4e98b10900)

Linux (patch: 6.6.128)

Linux (539dda3c5d190c5088b5e57944b1b482fcb464de <89764cf44544e943230f5e03b8c40a90da26537c)

Linux (patch: 6.12.75)

Linux (patch: 6.1.165)

Linux (5.13)

Linux (patch: 5.15.202)

Linux (539dda3c5d190c5088b5e57944b1b482fcb464de <8a5752c6dcc085a3bfc78589925182e4e98468c5)

Linux (patch: 6.19.6)

Linux (patch: 0)

Linux (539dda3c5d190c5088b5e57944b1b482fcb464de <a3034a8d56174dd6464c46823438f25797910a8d)

Linux (539dda3c5d190c5088b5e57944b1b482fcb464de <a26dda3bae469c8e4e1b1993ad33dafa32d0fc28)

Linux (539dda3c5d190c5088b5e57944b1b482fcb464de <b690635d4719214892855b79ce018d4b1672ac96)

Linux (539dda3c5d190c5088b5e57944b1b482fcb464de <c18493f750208eb4ff1198fc5a02786b8b2d70a6)

Linux (patch: 6.18.16)

Linux (patch: 7.0)

ENISA description: In the Linux kernel, the following vulnerability has been resolved: dpaa2-switch: validate num_ifs to prevent out-of-bounds write The driver obtains sw_attr.num_ifs from firmware via dpsw_get_attributes() but never validates it against DPSW_MAX_IF (64). This value controls iteration in dpaa2_switch_fdb_get_flood_cfg(), which writes port indices into the fixed-size cfg->if_id[DPSW_MAX_IF] array. When firmware reports num_ifs >= 64, the loop can write past the array bounds. Add a bound check for num_ifs in dpaa2_switch_init(). dpaa2_switch_fdb_get_flood_cfg() appends the control interface (port num_ifs) after all matched ports. When num_ifs == DPSW_MAX_IF and all ports match the flood filter, the loop fills all 64 slots and the control interface write overflows by one entry. The check uses >= because num_ifs == DPSW_MAX_IF is also functionally broken. build_if_id_bitmap() silently drops any ID >= 64: if (id[i] < DPSW_MAX_IF) bmap[id[i] / 64] |= ...

EUVD references (7)

Affected products (2)

Vendor	Product	Versions	Platforms
Linux	Linux	`539dda3c5d190c5088b5e57944b1b482fcb464de` (affected), `539dda3c5d190c5088b5e57944b1b482fcb464de` (affected), `539dda3c5d190c5088b5e57944b1b482fcb464de` (affected), `539dda3c5d190c5088b5e57944b1b482fcb464de` (affected), `539dda3c5d190c5088b5e57944b1b482fcb464de` (affected), `539dda3c5d190c5088b5e57944b1b482fcb464de` (affected), `539dda3c5d190c5088b5e57944b1b482fcb464de` (affected)	—
Linux	Linux	`5.13` (affected), `0` (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)	—

Affected products — CPE 2.3 (2) 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:7.0:rc1:*:*:*:*:*:*

Vendor references (7)

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

MITRE references (7) 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/787.html rapid7:cwe.mitre.org
https://attackerkb.com/topics/CVE-2026-43205 rapid7:attackerkb.com
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-27768 rapid7:euvd.enisa.europa.eu
https://www.first.org/epss/ tenable:www.first.org
https://nvd.nist.gov/vuln/detail/CVE-2026-43205 tenable:nvd.nist.gov
https://www.cve.org/CVERecord?id=CVE-2026-43205 tenable:www.cve.org

NVD-tagged references (7)

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

https://git.kernel.org/stable/c/89764cf44544e943230f5e03b8c40a90da26537c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
https://git.kernel.org/stable/c/8a5752c6dcc085a3bfc78589925182e4e98468c5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
https://git.kernel.org/stable/c/8b841fd529db9faf8bc678d429d4bf4e98b10900 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
https://git.kernel.org/stable/c/a26dda3bae469c8e4e1b1993ad33dafa32d0fc28 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
https://git.kernel.org/stable/c/a3034a8d56174dd6464c46823438f25797910a8d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
https://git.kernel.org/stable/c/b690635d4719214892855b79ce018d4b1672ac96 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
https://git.kernel.org/stable/c/c18493f750208eb4ff1198fc5a02786b8b2d70a6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch

Remediations (18)

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

Microsoft May 2026 security updates - securereading.com

web:securereading.com

Microsoft has released its May 2026 Patch Tuesday security updates addressing multiple critical vulnerabilities affecting enterprise cloud services, operating systems, virtualization infrastructure, authentication platforms, and business applications.

2026-05-23 21:12 UTC
Addressing Exchange Server May 2026 vulnerability CVE-2026-42897

web:techcommunity.microsoft.com

More information on this service can be found in Exchange Emergency Mitigation Service (Exchange EM Service) | Microsoft Learn. Customers with EM Service enabled can verify that their servers have applied the mitigation for CVE - 2026 -42897 (the ID of mitigation is M2.1.x) by doing the following:

2026-05-23 21:12 UTC
Microsoft Patch Tuesday April 2026 Fixes 167 Bugs

web:thecyberexpress.com

Microsoft's Patch Tuesday April 2026 release has introduced one of the most extensive security update rollouts of the year, addressing a total of 167 vulnerabilities across Windows operating systems and associated software. This latest Microsoft Patch Tuesday also includes fixes for two zero-day vulnerabilities, one of which was actively exploited in real-world attacks, alongside critical ...

2026-05-23 21:12 UTC
Windows April 2026 update bug, LSASS crash, reboot loop fix - WinCentral

web:thewincentral.com

April 2026 Windows update causes LSASS crashes and reboot loops on domain controllers. Microsoft is working on a fix . - Read in Latest News on WinCentral

2026-05-23 21:12 UTC
138 CVEs Fixed: Netlogon RCE Leads Microsoft's Patch Pack - DNS Bug ...

web:vulert.com

Microsoft's May 2026 Patch Tuesday fixes 138 vulnerabilities, including critical Windows DNS and Netlogon RCE flaws. Learn the risks, key CVEs , mitigation steps, and how Vulert can help.

2026-05-23 21:12 UTC
Microsoft April 2026 Patch Tuesday fixes 167 flaws, 2 zero-days

web:www.bleepingcomputer.com

Today is Microsoft's April 2026 Patch Tuesday with security updates for 167 flaws, including 2 zero-day vulnerabilities.

2026-05-23 21:12 UTC
FIX Stock Quote Price and Forecast | CNN

web:www.cnn.com

View Comfort Systems USA, Inc. FIX stock quote prices, financial information, real-time forecasts, and company news from CNN.

2026-05-23 21:12 UTC
Oracle Critical Patch Update Advisory - January 2026

web:www.oracle.com

Oracle Critical Patch Update Advisory - January 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 ...

2026-05-23 21:12 UTC
Home - PATCH Hawaii

web:www.patchhawaii.org

PATCH provides access to registered and licensed child care, offers child care subsidies to eligible families, provides child development training and ECE scholarship opportunities, and assists those interested in starting a family child care business. PATCH is a free resource hub for families, child care professionals and communities of Hawaii.

2026-05-23 21:12 UTC
Patch Tuesday May 2026: Security Updates & CVE Analysis

web:zecurit.com

Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

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 .

2026-05-26 02:46 UTC
Patch Tuesday, April 2026 Edition - Krebs on Security

web:krebsonsecurity.com

For a clickable, per- patch breakdown, check out the SANS Internet Storm Center Patch Tuesday roundup. Running into problems applying any of these updates?

2026-05-26 02:46 UTC
Nvd - Cve-2026-32005

web:nvd.nist.gov

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

2026-05-26 02:46 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.

2026-05-26 02:46 UTC
Critical Patches Issued for Microsoft Products, April 14, 2026

web:www.cisecurity.org

<p>Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution. Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged-on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or ...

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
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
CVE 2026 — The Vulnerabilities That Matter Most Right Now

web:www.penligent.ai

Second, chipset and OEM dependencies make remediation slower and messier than software-only patching. Google's bulletin explains the two Android patch levels for March 2026 and clarifies that devices with security patch levels of 2026 -03-01 or 2026 -03-05 are protected against the associated issues, depending on applicable components.

2026-05-26 02:46 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-43205.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "lessThan": "a26dda3bae469c8e4e1b1993ad33dafa32d0fc28",
              "status": "affected",
              "version": "539dda3c5d190c5088b5e57944b1b482fcb464de",
              "versionType": "git"
            },
            {
              "lessThan": "a3034a8d56174dd6464c46823438f25797910a8d",
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            },
            {
              "lessThan": "b690635d4719214892855b79ce018d4b1672ac96",
              "status": "affected",
              "version": "539dda3c5d190c5088b5e57944b1b482fcb464de",
              "versionType": "git"
            },
            {
              "lessThan": "8b841fd529db9faf8bc678d429d4bf4e98b10900",
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            {
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            },
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            }
          ]
        },
        {
          "defaultStatus": "affected",
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.13"
            },
            {
              "lessThan": "5.13",
              "status": "unaffected",
              "version": "0",
              "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": "5.15.202",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.165",
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                  "vulnerable": true
                },
                {
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                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "6.12.75",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.16",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.6",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndpaa2-switch: validate num_ifs to prevent out-of-bounds write\n\nThe driver obtains sw_attr.num_ifs from firmware via dpsw_get_attributes()\nbut never validates it against DPSW_MAX_IF (64). This value controls\niteration in dpaa2_switch_fdb_get_flood_cfg(), which writes port indices\ninto the fixed-size cfg->if_id[DPSW_MAX_IF] array. When firmware reports\nnum_ifs >= 64, the loop can write past the array bounds.\n\nAdd a bound check for num_ifs in dpaa2_switch_init().\n\ndpaa2_switch_fdb_get_flood_cfg() appends the control interface (port\nnum_ifs) after all matched ports. When num_ifs == DPSW_MAX_IF and all\nports match the flood filter, the loop fills all 64 slots and the control\ninterface write overflows by one entry.\n\nThe check uses >= because num_ifs == DPSW_MAX_IF is also functionally\nbroken.\n\nbuild_if_id_bitmap() silently drops any ID >= 64:\n      if (id[i] < DPSW_MAX_IF)\n          bmap[id[i] / 64] |= ..."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:20:00.994Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a26dda3bae469c8e4e1b1993ad33dafa32d0fc28"
        },
        {
          "url": "https://git.kernel.org/stable/c/a3034a8d56174dd6464c46823438f25797910a8d"
        },
        {
          "url": "https://git.kernel.org/stable/c/b690635d4719214892855b79ce018d4b1672ac96"
        },
        {
          "url": "https://git.kernel.org/stable/c/8b841fd529db9faf8bc678d429d4bf4e98b10900"
        },
        {
          "url": "https://git.kernel.org/stable/c/89764cf44544e943230f5e03b8c40a90da26537c"
        },
        {
          "url": "https://git.kernel.org/stable/c/c18493f750208eb4ff1198fc5a02786b8b2d70a6"
        },
        {
          "url": "https://git.kernel.org/stable/c/8a5752c6dcc085a3bfc78589925182e4e98468c5"
        }
      ],
      "title": "dpaa2-switch: validate num_ifs to prevent out-of-bounds write",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43205",
    "datePublished": "2026-05-06T11:28:10.270Z",
    "dateReserved": "2026-05-01T14:12:55.992Z",
    "dateUpdated": "2026-05-11T22:20:00.994Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}