Vulnerability-Lookup

GHSA-XW2R-79G3-4R47

Vulnerability from github – Published: 2026-10-18 18:32 – Updated: 2026-10-30 15:34

Details

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

wifi: cfg80211: preserve hidden-group beacon IE ownership

A hidden-group probe-response entry borrows its beacon IEs from the group's beacon entry. cfg80211_update_assoc_bss_entry() can pass such an entry to cfg80211_update_known_bss() when merging scan entries after a channel switch.

Copying the borrowed beacon_ies into the associated entry gives the same allocation two owners. Releasing the group's beacon entry can then leave the associated entry pointing to freed IEs, which are freed again when that entry is released.

Skip beacon IE replacement when the source entry belongs to a hidden group. Preserve probe-response processing, the subsequent metadata updates, and the existing rejection path for conflicting hidden beacon updates.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-98823"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-18T16:17:36Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: preserve hidden-group beacon IE ownership\n\nA hidden-group probe-response entry borrows its beacon IEs from the\ngroup\u0027s beacon entry. cfg80211_update_assoc_bss_entry() can pass such\nan entry to cfg80211_update_known_bss() when merging scan entries\nafter a channel switch.\n\nCopying the borrowed beacon_ies into the associated entry gives the\nsame allocation two owners. Releasing the group\u0027s beacon entry can\nthen leave the associated entry pointing to freed IEs, which are\nfreed again when that entry is released.\n\nSkip beacon IE replacement when the source entry belongs to a hidden\ngroup. Preserve probe-response processing, the subsequent metadata\nupdates, and the existing rejection path for conflicting hidden\nbeacon updates.",
  "id": "GHSA-xw2r-79g3-4r47",
  "modified": "2026-10-30T15:34:03Z",
  "published": "2026-10-18T18:32:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98823"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/00f83d39675adc12d56957a1f5e316812157e4d3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3c44f780d1738e9ddf438729f5ff6ceb45f9ded3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/49b66110a08e4f926f6393e938f226de2750a08b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5617d5328839003c91007ce906b4f100b43926e9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5f27581c176f84b52ec0ab9be7b500c10667ef60"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8f79f429dc87a4f21e4fcf9a4d3df9484ca9a294"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cc45f313d85533d647ce619326302aad6f797c14"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd7973a4130b0862be38d7e08cc0e874b3d99967"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-98823 (GCVE-0-2026-98823)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:49 – Updated: 2026-10-30 12:40

Title

wifi: cfg80211: preserve hidden-group beacon IE ownership

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: preserve hidden-group beacon IE ownership A hidden-group probe-response entry borrows its beacon IEs from the group's beacon entry. cfg80211_update_assoc_bss_entry() can pass such an entry to cfg80211_update_known_bss() when merging scan entries after a channel switch. Copying the borrowed beacon_ies into the associated entry gives the same allocation two owners. Releasing the group's beacon entry can then leave the associated entry pointing to freed IEs, which are freed again when that entry is released. Skip beacon IE replacement when the source entry belongs to a hidden group. Preserve probe-response processing, the subsequent metadata updates, and the existing rejection path for conflicting hidden beacon updates.

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7018 records in the last 180 days details

References

8 references

URL	Tags
https://git.kernel.org/stable/c/00f83d39675adc12d…
https://git.kernel.org/stable/c/3c44f780d1738e9dd…
https://git.kernel.org/stable/c/8f79f429dc87a4f21…
https://git.kernel.org/stable/c/5617d5328839003c9…
https://git.kernel.org/stable/c/49b66110a08e4f926…
https://git.kernel.org/stable/c/dd7973a4130b0862b…
https://git.kernel.org/stable/c/5f27581c176f84b52…
https://git.kernel.org/stable/c/cc45f313d85533d64…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0afd425b1b64251f19b5d8d8b49bf56fefbc643f , < 00f83d39675adc12d56957a1f5e316812157e4d3 (git) Affected: 0afd425b1b64251f19b5d8d8b49bf56fefbc643f , < 3c44f780d1738e9ddf438729f5ff6ceb45f9ded3 (git) Affected: 0afd425b1b64251f19b5d8d8b49bf56fefbc643f , < 8f79f429dc87a4f21e4fcf9a4d3df9484ca9a294 (git) Affected: 0afd425b1b64251f19b5d8d8b49bf56fefbc643f , < 5617d5328839003c91007ce906b4f100b43926e9 (git) Affected: 0afd425b1b64251f19b5d8d8b49bf56fefbc643f , < 49b66110a08e4f926f6393e938f226de2750a08b (git) Affected: 0afd425b1b64251f19b5d8d8b49bf56fefbc643f , < dd7973a4130b0862be38d7e08cc0e874b3d99967 (git) Affected: 0afd425b1b64251f19b5d8d8b49bf56fefbc643f , < 5f27581c176f84b52ec0ab9be7b500c10667ef60 (git) Affected: 0afd425b1b64251f19b5d8d8b49bf56fefbc643f , < cc45f313d85533d647ce619326302aad6f797c14 (git)
Linux	Linux	Affected: 5.4 Unaffected: 0 , < 5.4 (semver) Unaffected: 5.10.273 , ≤ 5.10.* (semver) Unaffected: 5.15.224 , ≤ 5.15.* (semver) Unaffected: 6.1.191 , ≤ 6.1.* (semver) Unaffected: 6.6.160 , ≤ 6.6.* (semver) Unaffected: 6.12.113 , ≤ 6.12.* (semver) Unaffected: 6.18.56 , ≤ 6.18.* (semver) Unaffected: 7.2.10 , ≤ 7.2.* (semver) Unaffected: 7.3 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/wireless/scan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "00f83d39675adc12d56957a1f5e316812157e4d3",
              "status": "affected",
              "version": "0afd425b1b64251f19b5d8d8b49bf56fefbc643f",
              "versionType": "git"
            },
            {
              "lessThan": "3c44f780d1738e9ddf438729f5ff6ceb45f9ded3",
              "status": "affected",
              "version": "0afd425b1b64251f19b5d8d8b49bf56fefbc643f",
              "versionType": "git"
            },
            {
              "lessThan": "8f79f429dc87a4f21e4fcf9a4d3df9484ca9a294",
              "status": "affected",
              "version": "0afd425b1b64251f19b5d8d8b49bf56fefbc643f",
              "versionType": "git"
            },
            {
              "lessThan": "5617d5328839003c91007ce906b4f100b43926e9",
              "status": "affected",
              "version": "0afd425b1b64251f19b5d8d8b49bf56fefbc643f",
              "versionType": "git"
            },
            {
              "lessThan": "49b66110a08e4f926f6393e938f226de2750a08b",
              "status": "affected",
              "version": "0afd425b1b64251f19b5d8d8b49bf56fefbc643f",
              "versionType": "git"
            },
            {
              "lessThan": "dd7973a4130b0862be38d7e08cc0e874b3d99967",
              "status": "affected",
              "version": "0afd425b1b64251f19b5d8d8b49bf56fefbc643f",
              "versionType": "git"
            },
            {
              "lessThan": "5f27581c176f84b52ec0ab9be7b500c10667ef60",
              "status": "affected",
              "version": "0afd425b1b64251f19b5d8d8b49bf56fefbc643f",
              "versionType": "git"
            },
            {
              "lessThan": "cc45f313d85533d647ce619326302aad6f797c14",
              "status": "affected",
              "version": "0afd425b1b64251f19b5d8d8b49bf56fefbc643f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/wireless/scan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.4"
            },
            {
              "lessThan": "5.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.273",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.224",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.273",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.224",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.191",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.160",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.113",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.56",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.10",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: preserve hidden-group beacon IE ownership\n\nA hidden-group probe-response entry borrows its beacon IEs from the\ngroup\u0027s beacon entry. cfg80211_update_assoc_bss_entry() can pass such\nan entry to cfg80211_update_known_bss() when merging scan entries\nafter a channel switch.\n\nCopying the borrowed beacon_ies into the associated entry gives the\nsame allocation two owners. Releasing the group\u0027s beacon entry can\nthen leave the associated entry pointing to freed IEs, which are\nfreed again when that entry is released.\n\nSkip beacon IE replacement when the source entry belongs to a hidden\ngroup. Preserve probe-response processing, the subsequent metadata\nupdates, and the existing rejection path for conflicting hidden\nbeacon updates."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:40:00.224Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/00f83d39675adc12d56957a1f5e316812157e4d3"
        },
        {
          "url": "https://git.kernel.org/stable/c/3c44f780d1738e9ddf438729f5ff6ceb45f9ded3"
        },
        {
          "url": "https://git.kernel.org/stable/c/8f79f429dc87a4f21e4fcf9a4d3df9484ca9a294"
        },
        {
          "url": "https://git.kernel.org/stable/c/5617d5328839003c91007ce906b4f100b43926e9"
        },
        {
          "url": "https://git.kernel.org/stable/c/49b66110a08e4f926f6393e938f226de2750a08b"
        },
        {
          "url": "https://git.kernel.org/stable/c/dd7973a4130b0862be38d7e08cc0e874b3d99967"
        },
        {
          "url": "https://git.kernel.org/stable/c/5f27581c176f84b52ec0ab9be7b500c10667ef60"
        },
        {
          "url": "https://git.kernel.org/stable/c/cc45f313d85533d647ce619326302aad6f797c14"
        }
      ],
      "title": "wifi: cfg80211: preserve hidden-group beacon IE ownership",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98823",
    "datePublished": "2026-10-18T15:49:15.473Z",
    "dateReserved": "2026-09-25T10:25:14.372Z",
    "dateUpdated": "2026-10-30T12:40:00.224Z",
    "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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted