CVE-2026-43141 (GCVE-0-2026-43141)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:27 – Updated: 2026-05-07 17:14
VLAI?
Title
ntb: ntb_hw_switchtec: Fix shift-out-of-bounds for 0 mw lut
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: ec0467ccbdeb69a86c8729073057bda7bce00eec , < d652ef399f131fcd5f8f34266167449ee7c9e5b3 (git)
Affected: ec0467ccbdeb69a86c8729073057bda7bce00eec , < 5590cd04d6845c01a6bad985a491c58af6fb5389 (git)
Affected: ec0467ccbdeb69a86c8729073057bda7bce00eec , < a11d03d116eef138a7249202bd772c8e61915aec (git)
Affected: ec0467ccbdeb69a86c8729073057bda7bce00eec , < d0559d07afabfddaaded6a61a16154486b956764 (git)
Affected: ec0467ccbdeb69a86c8729073057bda7bce00eec , < 2e4d5e8d86a969318340be95470bb76e52392082 (git)
Affected: ec0467ccbdeb69a86c8729073057bda7bce00eec , < a133e3caf844a3f56b6eef89ddaa66115874f6bd (git)
Affected: ec0467ccbdeb69a86c8729073057bda7bce00eec , < 1a867d0d79a4a570a33f2f433919ad2bd7a27b67 (git)
Affected: ec0467ccbdeb69a86c8729073057bda7bce00eec , < 186615f8855a0be4ee7d3fcd09a8ecc10e783b08 (git)
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    Linux Linux Affected: 4.15
Unaffected: 0 , < 4.15 (semver)
Unaffected: 5.10.252 , ≤ 5.10.* (semver)
Unaffected: 5.15.202 , ≤ 5.15.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/ntb/hw/mscc/ntb_hw_switchtec.c"
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          "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."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-05-07T17:14:27.409Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "state": "PUBLISHED"
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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.