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GHSA-C6XM-V6X8-64WH

Vulnerability from github – Published: 2026-10-06 09:31 – Updated: 2026-10-06 09:31

Details

In the Linux kernel, the following vulnerability has been resolved:

wifi: brcmfmac: cyw: pass PMKID to firmware if present

Zero out auth_status on initialization. Otherwise, garbage will leak from the stack to the firmware (when ssid is less than 32 bytes and/or when params->pmkid is set). Then, pass the params->pmkid to the firmware (without it, the firmware caches a garbage PMKID on successful authentication and denies a subsequent association request that includes the PMKID).

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98350"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-06T09:18:28Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: brcmfmac: cyw: pass PMKID to firmware if present\n\nZero out auth_status on initialization. Otherwise, garbage will\nleak from the stack to the firmware (when ssid is less than 32 bytes\nand/or when params-\u003epmkid is set). Then, pass the params-\u003epmkid to the\nfirmware (without it, the firmware caches a garbage PMKID on successful\nauthentication and denies a subsequent association request that includes\nthe PMKID).",
  "id": "GHSA-c6xm-v6x8-64wh",
  "modified": "2026-10-06T09:31:35Z",
  "published": "2026-10-06T09:31:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98350"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6fba6233e9ca7718661e53555a3961c58772c21a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c2cf589c7d546557ed60c43f2ec014279265dfbf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e2de8d5eb2984416affdd9559e55f37c7f1bbf47"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-98350 (GCVE-0-2026-98350)

Vulnerability from cvelistv5 – Published: 2026-10-06 08:46 – Updated: 2026-10-06 08:46

Title

wifi: brcmfmac: cyw: pass PMKID to firmware if present

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: cyw: pass PMKID to firmware if present Zero out auth_status on initialization. Otherwise, garbage will leak from the stack to the firmware (when ssid is less than 32 bytes and/or when params->pmkid is set). Then, pass the params->pmkid to the firmware (without it, the firmware caches a garbage PMKID on successful authentication and denies a subsequent association request that includes the PMKID).

Severity

No CVSS data available.

Assigner

Linux mitre root Scorecard

References

3 references

URL	Tags
https://git.kernel.org/stable/c/c2cf589c7d546557e…
https://git.kernel.org/stable/c/6fba6233e9ca77186…
https://git.kernel.org/stable/c/e2de8d5eb2984416a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 66f909308a7c05082919ff214a0bbe2a76aa0283 , < c2cf589c7d546557ed60c43f2ec014279265dfbf (git) Affected: 66f909308a7c05082919ff214a0bbe2a76aa0283 , < 6fba6233e9ca7718661e53555a3961c58772c21a (git) Affected: 66f909308a7c05082919ff214a0bbe2a76aa0283 , < e2de8d5eb2984416affdd9559e55f37c7f1bbf47 (git)
Linux	Linux	Affected: 6.16 Unaffected: 0 , < 6.16 (semver) Unaffected: 6.18.54 , ≤ 6.18.* (semver) Unaffected: 7.2.8 , ≤ 7.2.* (semver) Unaffected: 7.3-rc4 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/broadcom/brcm80211/brcmfmac/cyw/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c2cf589c7d546557ed60c43f2ec014279265dfbf",
              "status": "affected",
              "version": "66f909308a7c05082919ff214a0bbe2a76aa0283",
              "versionType": "git"
            },
            {
              "lessThan": "6fba6233e9ca7718661e53555a3961c58772c21a",
              "status": "affected",
              "version": "66f909308a7c05082919ff214a0bbe2a76aa0283",
              "versionType": "git"
            },
            {
              "lessThan": "e2de8d5eb2984416affdd9559e55f37c7f1bbf47",
              "status": "affected",
              "version": "66f909308a7c05082919ff214a0bbe2a76aa0283",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/broadcom/brcm80211/brcmfmac/cyw/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.54",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.8",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc4",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: brcmfmac: cyw: pass PMKID to firmware if present\n\nZero out auth_status on initialization. Otherwise, garbage will\nleak from the stack to the firmware (when ssid is less than 32 bytes\nand/or when params-\u003epmkid is set). Then, pass the params-\u003epmkid to the\nfirmware (without it, the firmware caches a garbage PMKID on successful\nauthentication and denies a subsequent association request that includes\nthe PMKID)."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-06T08:46:38.525Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c2cf589c7d546557ed60c43f2ec014279265dfbf"
        },
        {
          "url": "https://git.kernel.org/stable/c/6fba6233e9ca7718661e53555a3961c58772c21a"
        },
        {
          "url": "https://git.kernel.org/stable/c/e2de8d5eb2984416affdd9559e55f37c7f1bbf47"
        }
      ],
      "title": "wifi: brcmfmac: cyw: pass PMKID to firmware if present",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98350",
    "datePublished": "2026-10-06T08:46:38.525Z",
    "dateReserved": "2026-09-25T10:25:14.343Z",
    "dateUpdated": "2026-10-06T08:46:38.525Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-C6XM-V6X8-64WH

CVE-2026-98350 (GCVE-0-2026-98350)

Tags

Sightings

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