FKIE_CVE-2026-98702

Vulnerability from fkie_nvd - Published: 2026-10-18 16:17 - Updated: 2026-10-19 10:19
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1892e71aa2e5ee667d87c6e49e3661f5e290303b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/56e236759f0a8dc910c2ae7cd3c161f298ee5794
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/79b3ce0d881cd6e5d4d3496b19f5cc5e7089a56c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cf0ddacce173890407ed3fa50c8ea9b3c0cc0e16
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/spectmgmt.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "cf0ddacce173890407ed3fa50c8ea9b3c0cc0e16",
              "status": "affected",
              "version": "21c3f8f95554feff9bed15703e89adbe582e0383",
              "versionType": "git"
            },
            {
              "lessThan": "1892e71aa2e5ee667d87c6e49e3661f5e290303b",
              "status": "affected",
              "version": "21c3f8f95554feff9bed15703e89adbe582e0383",
              "versionType": "git"
            },
            {
              "lessThan": "79b3ce0d881cd6e5d4d3496b19f5cc5e7089a56c",
              "status": "affected",
              "version": "21c3f8f95554feff9bed15703e89adbe582e0383",
              "versionType": "git"
            },
            {
              "lessThan": "56e236759f0a8dc910c2ae7cd3c161f298ee5794",
              "status": "affected",
              "version": "21c3f8f95554feff9bed15703e89adbe582e0383",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/spectmgmt.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.9"
            },
            {
              "lessThan": "6.9",
              "status": "unaffected",
              "version": "0",
              "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"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "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",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1892e71aa2e5ee667d87c6e49e3661f5e290303b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/56e236759f0a8dc910c2ae7cd3c161f298ee5794"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/79b3ce0d881cd6e5d4d3496b19f5cc5e7089a56c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cf0ddacce173890407ed3fa50c8ea9b3c0cc0e16"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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