Vulnerability-Lookup

CVE-2026-98423 (GCVE-0-2026-98423)

Vulnerability from cvelistv5 – Published: 2026-10-14 13:27 – Updated: 2026-10-14 13:27

Title

wifi: mac80211_hwsim: don't hand frames to mac80211 while stopping

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: don't hand frames to mac80211 while stopping The code checks ->started for frames coming from wmediumd, but the radio can be stopped after the check and before frame delivery, causing mac80211 to hit the WARN_ON(!local->started). Expand the mutex for this case and synchronise against it when the radio is stopped to avoid being able to hit the warning with hwsim. Drop the error print that would've complicated the error path, it only triggers for allocation failures (already noisy) and malformed frames anyway.

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6667 records in the last 180 days details

References

6 references

URL	Tags
https://git.kernel.org/stable/c/5ce9b2bc9e73213e3…
https://git.kernel.org/stable/c/c4e4fe330294e3936…
https://git.kernel.org/stable/c/2f59be7585dc81baa…
https://git.kernel.org/stable/c/5c79ef616aa16af58…
https://git.kernel.org/stable/c/d7fa45d8123a7f794…
https://git.kernel.org/stable/c/87840d4a3a21b1c19…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 7882513bacb176ab4aacceefdd035ca9479da4fb , < 5ce9b2bc9e73213e316a8c72400256a76bf41814 (git) Affected: 7882513bacb176ab4aacceefdd035ca9479da4fb , < c4e4fe330294e3936e0f4e15d6996468f8a45fb2 (git) Affected: 7882513bacb176ab4aacceefdd035ca9479da4fb , < 2f59be7585dc81baa6f36b0035dd6848ea43d318 (git) Affected: 7882513bacb176ab4aacceefdd035ca9479da4fb , < 5c79ef616aa16af582fb2cb93b0f750975a0004f (git) Affected: 7882513bacb176ab4aacceefdd035ca9479da4fb , < d7fa45d8123a7f794b93fc22dbcf19f38dc4d8cb (git) Affected: 7882513bacb176ab4aacceefdd035ca9479da4fb , < 87840d4a3a21b1c19b867a80e16ba69dff284de2 (git)	guessed
Linux	Linux	Affected: 3.1 Unaffected: 0 , < 3.1 (semver) Unaffected: 6.1.189 , ≤ 6.1.* (semver) Unaffected: 6.6.158 , ≤ 6.6.* (semver) Unaffected: 6.12.112 , ≤ 6.12.* (semver) Unaffected: 6.18.54 , ≤ 6.18.* (semver) Unaffected: 7.2.8 , ≤ 7.2.* (semver) Unaffected: 7.3-rc4 , ≤ * (original_commit_for_fix)	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/virtual/mac80211_hwsim_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5ce9b2bc9e73213e316a8c72400256a76bf41814",
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            },
            {
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              "versionType": "git"
            },
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/virtual/mac80211_hwsim_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.1"
            },
            {
              "lessThan": "3.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "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:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "3.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.158",
                  "versionStartIncluding": "3.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
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                },
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211_hwsim: don\u0027t hand frames to mac80211 while stopping\n\nThe code checks -\u003estarted for frames coming from wmediumd, but the\nradio can be stopped after the check and before frame delivery,\ncausing mac80211 to hit the WARN_ON(!local-\u003estarted).\n\nExpand the mutex for this case and synchronise against it when the\nradio is stopped to avoid being able to hit the warning with hwsim.\n\nDrop the error print that would\u0027ve complicated the error path, it\nonly triggers for allocation failures (already noisy) and malformed\nframes anyway."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-14T13:27:51.391Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5ce9b2bc9e73213e316a8c72400256a76bf41814"
        },
        {
          "url": "https://git.kernel.org/stable/c/c4e4fe330294e3936e0f4e15d6996468f8a45fb2"
        },
        {
          "url": "https://git.kernel.org/stable/c/2f59be7585dc81baa6f36b0035dd6848ea43d318"
        },
        {
          "url": "https://git.kernel.org/stable/c/5c79ef616aa16af582fb2cb93b0f750975a0004f"
        },
        {
          "url": "https://git.kernel.org/stable/c/d7fa45d8123a7f794b93fc22dbcf19f38dc4d8cb"
        },
        {
          "url": "https://git.kernel.org/stable/c/87840d4a3a21b1c19b867a80e16ba69dff284de2"
        }
      ],
      "title": "wifi: mac80211_hwsim: don\u0027t hand frames to mac80211 while stopping",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98423",
    "datePublished": "2026-10-14T13:27:51.391Z",
    "dateReserved": "2026-09-25T10:25:14.348Z",
    "dateUpdated": "2026-10-14T13:27:51.391Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-98423",
      "date": "2026-10-15",
      "epss": "0.00215",
      "percentile": "0.11073"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/net/wireless/virtual/mac80211_hwsim_main.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
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                    "status": "affected",
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                    "versionType": "git"
                  },
                  {
                    "lessThan": "c4e4fe330294e3936e0f4e15d6996468f8a45fb2",
                    "status": "affected",
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                    "versionType": "git"
                  },
                  {
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                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/net/wireless/virtual/mac80211_hwsim_main.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "3.1"
                  },
                  {
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                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
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                    "status": "unaffected",
                    "version": "6.1.189",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.158",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.112",
                    "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": "*",
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                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
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          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211_hwsim: don\u0027t hand frames to mac80211 while stopping\n\nThe code checks -\u003estarted for frames coming from wmediumd, but the\nradio can be stopped after the check and before frame delivery,\ncausing mac80211 to hit the WARN_ON(!local-\u003estarted).\n\nExpand the mutex for this case and synchronise against it when the\nradio is stopped to avoid being able to hit the warning with hwsim.\n\nDrop the error print that would\u0027ve complicated the error path, it\nonly triggers for allocation failures (already noisy) and malformed\nframes anyway."
          }
        ],
        "id": "CVE-2026-98423",
        "lastModified": "2026-10-14T14:17:53.880",
        "metrics": {},
        "published": "2026-10-14T14:17:53.880",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/2f59be7585dc81baa6f36b0035dd6848ea43d318"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/5c79ef616aa16af582fb2cb93b0f750975a0004f"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/5ce9b2bc9e73213e316a8c72400256a76bf41814"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/87840d4a3a21b1c19b867a80e16ba69dff284de2"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/c4e4fe330294e3936e0f4e15d6996468f8a45fb2"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/d7fa45d8123a7f794b93fc22dbcf19f38dc4d8cb"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-15T12:59:58+00:00",
      "cve": "CVE-2026-98423",
      "id": "CVE-2026-98423",
      "initial_release_date": "2026-10-14T00:00:00+00:00",
      "product_status:known_not_affected": "277",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: mac80211_hwsim: don\u0027t hand frames to mac80211 while stopping",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98423.json",
      "version": "3"
    }
  }
}

FKIE_CVE-2026-98423

Vulnerability from fkie_nvd - Published: 2026-10-14 14:17 - Updated: 2026-10-14 14:17

Severity

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2f59be7585dc81baa6f36b0035dd6848ea43d318
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5c79ef616aa16af582fb2cb93b0f750975a0004f
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5ce9b2bc9e73213e316a8c72400256a76bf41814
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/87840d4a3a21b1c19b867a80e16ba69dff284de2
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c4e4fe330294e3936e0f4e15d6996468f8a45fb2
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d7fa45d8123a7f794b93fc22dbcf19f38dc4d8cb

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/virtual/mac80211_hwsim_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5ce9b2bc9e73213e316a8c72400256a76bf41814",
              "status": "affected",
              "version": "7882513bacb176ab4aacceefdd035ca9479da4fb",
              "versionType": "git"
            },
            {
              "lessThan": "c4e4fe330294e3936e0f4e15d6996468f8a45fb2",
              "status": "affected",
              "version": "7882513bacb176ab4aacceefdd035ca9479da4fb",
              "versionType": "git"
            },
            {
              "lessThan": "2f59be7585dc81baa6f36b0035dd6848ea43d318",
              "status": "affected",
              "version": "7882513bacb176ab4aacceefdd035ca9479da4fb",
              "versionType": "git"
            },
            {
              "lessThan": "5c79ef616aa16af582fb2cb93b0f750975a0004f",
              "status": "affected",
              "version": "7882513bacb176ab4aacceefdd035ca9479da4fb",
              "versionType": "git"
            },
            {
              "lessThan": "d7fa45d8123a7f794b93fc22dbcf19f38dc4d8cb",
              "status": "affected",
              "version": "7882513bacb176ab4aacceefdd035ca9479da4fb",
              "versionType": "git"
            },
            {
              "lessThan": "87840d4a3a21b1c19b867a80e16ba69dff284de2",
              "status": "affected",
              "version": "7882513bacb176ab4aacceefdd035ca9479da4fb",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/virtual/mac80211_hwsim_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.1"
            },
            {
              "lessThan": "3.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "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"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211_hwsim: don\u0027t hand frames to mac80211 while stopping\n\nThe code checks -\u003estarted for frames coming from wmediumd, but the\nradio can be stopped after the check and before frame delivery,\ncausing mac80211 to hit the WARN_ON(!local-\u003estarted).\n\nExpand the mutex for this case and synchronise against it when the\nradio is stopped to avoid being able to hit the warning with hwsim.\n\nDrop the error print that would\u0027ve complicated the error path, it\nonly triggers for allocation failures (already noisy) and malformed\nframes anyway."
    }
  ],
  "id": "CVE-2026-98423",
  "lastModified": "2026-10-14T14:17:53.880",
  "metrics": {},
  "published": "2026-10-14T14:17:53.880",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2f59be7585dc81baa6f36b0035dd6848ea43d318"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5c79ef616aa16af582fb2cb93b0f750975a0004f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5ce9b2bc9e73213e316a8c72400256a76bf41814"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/87840d4a3a21b1c19b867a80e16ba69dff284de2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c4e4fe330294e3936e0f4e15d6996468f8a45fb2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d7fa45d8123a7f794b93fc22dbcf19f38dc4d8cb"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-GC6M-V2G5-2JW7

Vulnerability from github – Published: 2026-10-14 15:32 – Updated: 2026-10-14 15:32

Details

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

wifi: mac80211_hwsim: don't hand frames to mac80211 while stopping

The code checks ->started for frames coming from wmediumd, but the radio can be stopped after the check and before frame delivery, causing mac80211 to hit the WARN_ON(!local->started).

Expand the mutex for this case and synchronise against it when the radio is stopped to avoid being able to hit the warning with hwsim.

Drop the error print that would've complicated the error path, it only triggers for allocation failures (already noisy) and malformed frames anyway.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98423"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-14T14:17:53Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211_hwsim: don\u0027t hand frames to mac80211 while stopping\n\nThe code checks -\u003estarted for frames coming from wmediumd, but the\nradio can be stopped after the check and before frame delivery,\ncausing mac80211 to hit the WARN_ON(!local-\u003estarted).\n\nExpand the mutex for this case and synchronise against it when the\nradio is stopped to avoid being able to hit the warning with hwsim.\n\nDrop the error print that would\u0027ve complicated the error path, it\nonly triggers for allocation failures (already noisy) and malformed\nframes anyway.",
  "id": "GHSA-gc6m-v2g5-2jw7",
  "modified": "2026-10-14T15:32:21Z",
  "published": "2026-10-14T15:32:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98423"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2f59be7585dc81baa6f36b0035dd6848ea43d318"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5c79ef616aa16af582fb2cb93b0f750975a0004f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5ce9b2bc9e73213e316a8c72400256a76bf41814"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/87840d4a3a21b1c19b867a80e16ba69dff284de2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c4e4fe330294e3936e0f4e15d6996468f8a45fb2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d7fa45d8123a7f794b93fc22dbcf19f38dc4d8cb"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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CVE-2026-98423 (GCVE-0-2026-98423)

FKIE_CVE-2026-98423

GHSA-GC6M-V2G5-2JW7

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