CVE-2026-43110 (GCVE-0-2026-43110)

Vulnerability from cvelistv5 – Published: 2026-05-06 07:40 – Updated: 2026-05-06 07:40
VLAI?
Title
wifi: brcmfmac: validate bsscfg indices in IF events
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: validate bsscfg indices in IF events brcmf_fweh_handle_if_event() validates the firmware-provided interface index before it touches drvr->iflist[], but it still uses the raw bsscfgidx field as an array index without a matching range check. Reject IF events whose bsscfg index does not fit in drvr->iflist[] before indexing the interface array. [add missing wifi prefix]
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3ec7437e9d11374105c2c4e47ae671537729d7e6 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9fca68c2512a362cad258e4df12a307bb2ee4b8e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1ae1e1caa428844e481231f6dbe9b4f475f1d52d (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b427c2b05222db36d32ee141609de6128e9091bb (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 304950a467d83678bd0b0f46331882e2ac23b12d (git)
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    Linux Linux Unaffected: 6.6.136 , ≤ 6.6.* (semver)
Unaffected: 6.12.83 , ≤ 6.12.* (semver)
Unaffected: 6.18.24 , ≤ 6.18.* (semver)
Unaffected: 6.19.14 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/broadcom/brcm80211/brcmfmac/fweh.c"
          ],
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          "vendor": "Linux",
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            {
              "lessThanOrEqual": "6.19.*",
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              "version": "6.19.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: brcmfmac: validate bsscfg indices in IF events\n\nbrcmf_fweh_handle_if_event() validates the firmware-provided interface\nindex before it touches drvr-\u003eiflist[], but it still uses the raw\nbsscfgidx field as an array index without a matching range check.\n\nReject IF events whose bsscfg index does not fit in drvr-\u003eiflist[]\nbefore indexing the interface array.\n\n[add missing wifi prefix]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-06T07:40:37.250Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/3ec7437e9d11374105c2c4e47ae671537729d7e6"
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        },
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        },
        {
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      ],
      "title": "wifi: brcmfmac: validate bsscfg indices in IF events",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43110",
    "datePublished": "2026-05-06T07:40:37.250Z",
    "dateReserved": "2026-05-01T14:12:55.986Z",
    "dateUpdated": "2026-05-06T07:40:37.250Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-05-06",
      "epss": "0.00018",
      "percentile": "0.04837"
    },
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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

Author Source Type Date Other

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.