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

Vulnerability from cvelistv5 – Published: 2026-10-18 15:49 – Updated: 2026-10-30 12:40
VLAI
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
Impacted products
Vendor Product Version CPE status
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)
guessed Create a notification for this product.
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)
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          "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."
        }
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    "datePublished": "2026-10-18T15:49:15.473Z",
    "dateReserved": "2026-09-25T10:25:14.372Z",
    "dateUpdated": "2026-10-30T12:40:00.224Z",
    "state": "PUBLISHED"
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      "product_status:known_affected": "1",
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      "title": "wifi: cfg80211: preserve hidden-group beacon IE ownership",
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          }
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        "id": "CVE-2026-98823",
        "lastModified": "2026-10-30T13:21:29.160",
        "metrics": {},
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        "vulnStatus": "Received"
      }
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      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-23T20:25:33+00:00",
      "cve": "CVE-2026-98823",
      "id": "CVE-2026-98823",
      "initial_release_date": "2026-10-18T00:00:00+00:00",
      "product_status:known_affected": "250",
      "product_status:known_not_affected": "28",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: cfg80211: preserve hidden-group beacon IE ownership",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98823.json",
      "version": "3"
    }
  }
}



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