CVE-2026-98702 (GCVE-0-2026-98702)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:46 – Updated: 2026-10-19 09:24
VLAI
Title
wifi: mac80211: reject invalid 320 MHz CSA bandwidth
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: reject invalid 320 MHz CSA bandwidth The HT/VHT channel definition validator can receive a 320 MHz bandwidth indication from a received CSA frame on a non-6 GHz link. It warns for this unsupported width but continues with an uninitialized vht_operation.chan_width, which is then read by ieee80211_chandef_vht_oper(). With panic_on_warn enabled, this lets a received frame panic the kernel. Reject the channel definition before entering the VHT operation conversion. This preserves the existing CSA fallback while avoiding both the warning and the uninitialized read.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6820 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 21c3f8f95554feff9bed15703e89adbe582e0383 , < cf0ddacce173890407ed3fa50c8ea9b3c0cc0e16 (git)
Affected: 21c3f8f95554feff9bed15703e89adbe582e0383 , < 1892e71aa2e5ee667d87c6e49e3661f5e290303b (git)
Affected: 21c3f8f95554feff9bed15703e89adbe582e0383 , < 79b3ce0d881cd6e5d4d3496b19f5cc5e7089a56c (git)
Affected: 21c3f8f95554feff9bed15703e89adbe582e0383 , < 56e236759f0a8dc910c2ae7cd3c161f298ee5794 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.9
Unaffected: 0 , < 6.9 (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)
guessed Create a notification for this product.
Show details on NVD website
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
            "net/mac80211/spectmgmt.c"
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              "operator": "OR"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: reject invalid 320 MHz CSA bandwidth\n\nThe HT/VHT channel definition validator can receive a 320 MHz\nbandwidth indication from a received CSA frame on a non-6 GHz link.\nIt warns for this unsupported width but continues with an uninitialized\nvht_operation.chan_width, which is then read by\nieee80211_chandef_vht_oper(). With panic_on_warn enabled, this lets a\nreceived frame panic the kernel.\n\nReject the channel definition before entering the VHT operation\nconversion. This preserves the existing CSA fallback while avoiding\nboth the warning and the uninitialized read."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:24:11.728Z",
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        "shortName": "Linux"
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    "datePublished": "2026-10-18T15:46:32.122Z",
    "dateReserved": "2026-09-25T10:25:14.365Z",
    "dateUpdated": "2026-10-19T09:24:11.728Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-11-02",
      "epss": "0.00168",
      "percentile": "0.06012"
    },
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      "cve": "CVE-2026-98702",
      "id": "msrc_CVE-2026-98702",
      "initial_release_date": "2026-10-20T22:24:23.000Z",
      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "wifi: mac80211: reject invalid 320 MHz CSA bandwidth",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-98702.json",
      "version": "2"
    },
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        "cveTags": [],
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          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: reject invalid 320 MHz CSA bandwidth\n\nThe HT/VHT channel definition validator can receive a 320 MHz\nbandwidth indication from a received CSA frame on a non-6 GHz link.\nIt warns for this unsupported width but continues with an uninitialized\nvht_operation.chan_width, which is then read by\nieee80211_chandef_vht_oper(). With panic_on_warn enabled, this lets a\nreceived frame panic the kernel.\n\nReject the channel definition before entering the VHT operation\nconversion. This preserves the existing CSA fallback while avoiding\nboth the warning and the uninitialized read."
          }
        ],
        "id": "CVE-2026-98702",
        "lastModified": "2026-10-19T10:19:34.500",
        "metrics": {},
        "published": "2026-10-18T16:17:23.700",
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    }
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}



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