CVE-2026-43141 (GCVE-0-2026-43141)
Vulnerability from cvelistv5
Published
2026-05-06 11:27
Modified
2026-05-11 22:18
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ntb: ntb_hw_switchtec: Fix shift-out-of-bounds for 0 mw lut Number of MW LUTs depends on NTB configuration and can be set to zero, in such scenario rounddown_pow_of_two will cause undefined behaviour and should not be performed. This patch ensures that rounddown_pow_of_two is called on valid value.
References
Impacted products
Vendor Product Version
Linux Linux Version: ec0467ccbdeb69a86c8729073057bda7bce00eec
Version: ec0467ccbdeb69a86c8729073057bda7bce00eec
Version: ec0467ccbdeb69a86c8729073057bda7bce00eec
Version: ec0467ccbdeb69a86c8729073057bda7bce00eec
Version: ec0467ccbdeb69a86c8729073057bda7bce00eec
Version: ec0467ccbdeb69a86c8729073057bda7bce00eec
Version: ec0467ccbdeb69a86c8729073057bda7bce00eec
Version: ec0467ccbdeb69a86c8729073057bda7bce00eec
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "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": "d652ef399f131fcd5f8f34266167449ee7c9e5b3",
              "status": "affected",
              "version": "ec0467ccbdeb69a86c8729073057bda7bce00eec",
              "versionType": "git"
            },
            {
              "lessThan": "5590cd04d6845c01a6bad985a491c58af6fb5389",
              "status": "affected",
              "version": "ec0467ccbdeb69a86c8729073057bda7bce00eec",
              "versionType": "git"
            },
            {
              "lessThan": "a11d03d116eef138a7249202bd772c8e61915aec",
              "status": "affected",
              "version": "ec0467ccbdeb69a86c8729073057bda7bce00eec",
              "versionType": "git"
            },
            {
              "lessThan": "d0559d07afabfddaaded6a61a16154486b956764",
              "status": "affected",
              "version": "ec0467ccbdeb69a86c8729073057bda7bce00eec",
              "versionType": "git"
            },
            {
              "lessThan": "2e4d5e8d86a969318340be95470bb76e52392082",
              "status": "affected",
              "version": "ec0467ccbdeb69a86c8729073057bda7bce00eec",
              "versionType": "git"
            },
            {
              "lessThan": "a133e3caf844a3f56b6eef89ddaa66115874f6bd",
              "status": "affected",
              "version": "ec0467ccbdeb69a86c8729073057bda7bce00eec",
              "versionType": "git"
            },
            {
              "lessThan": "1a867d0d79a4a570a33f2f433919ad2bd7a27b67",
              "status": "affected",
              "version": "ec0467ccbdeb69a86c8729073057bda7bce00eec",
              "versionType": "git"
            },
            {
              "lessThan": "186615f8855a0be4ee7d3fcd09a8ecc10e783b08",
              "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 shift-out-of-bounds for 0 mw lut\n\nNumber of MW LUTs depends on NTB configuration and can be set to zero,\nin such scenario rounddown_pow_of_two will cause undefined behaviour and\nshould not be performed.\nThis patch ensures that rounddown_pow_of_two is called on valid value."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:18:33.118Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d652ef399f131fcd5f8f34266167449ee7c9e5b3"
        },
        {
          "url": "https://git.kernel.org/stable/c/5590cd04d6845c01a6bad985a491c58af6fb5389"
        },
        {
          "url": "https://git.kernel.org/stable/c/a11d03d116eef138a7249202bd772c8e61915aec"
        },
        {
          "url": "https://git.kernel.org/stable/c/d0559d07afabfddaaded6a61a16154486b956764"
        },
        {
          "url": "https://git.kernel.org/stable/c/2e4d5e8d86a969318340be95470bb76e52392082"
        },
        {
          "url": "https://git.kernel.org/stable/c/a133e3caf844a3f56b6eef89ddaa66115874f6bd"
        },
        {
          "url": "https://git.kernel.org/stable/c/1a867d0d79a4a570a33f2f433919ad2bd7a27b67"
        },
        {
          "url": "https://git.kernel.org/stable/c/186615f8855a0be4ee7d3fcd09a8ecc10e783b08"
        }
      ],
      "title": "ntb: ntb_hw_switchtec: Fix shift-out-of-bounds for 0 mw lut",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43141",
    "datePublished": "2026-05-06T11:27:26.193Z",
    "dateReserved": "2026-05-01T14:12:55.989Z",
    "dateUpdated": "2026-05-11T22:18:33.118Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.