CVE-2026-98421

Status: ReceivedUnscored—

Severity—Unscored

Exploitation probability0.21 %higher than 11% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitNot knownno public code found

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

wifi: mac80211: require a peer station for TDLS setup confirm

It's nonsense for the setup confirm to go to station that doesn't even exist, and it hits a warning when building the frame:

Only accept WLAN_TDLS_SETUP_CONFIRM when the station is already there as a TDLS station. Need to copy the call to ieee80211_tdls_prep_mgmt_packet() since the existing WLAN_TDLS_DISCOVERY_REQUEST already falls through to it.

Technical details traces, logs and code from the original report

  WARN_ON_ONCE(!sta || !ap_sta)

CVSS

NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.21 %
Percentile among all scored CVEs: 11
Score date: 10/21/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Linux — Linux Kernel^AI

References

Show 6 references

Raw JSON (NVD)

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{
  "id": "CVE-2026-98421",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6f7eaa47e1de30159277f91f1145a6687f13ffd9",
              "lessThan": "6bae6ef511a29ef12ab969adeea691067d4d5d74",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6f7eaa47e1de30159277f91f1145a6687f13ffd9",
              "lessThan": "d0afa5395c46d73ad2090aa50209886e84f179bd",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6f7eaa47e1de30159277f91f1145a6687f13ffd9",
              "lessThan": "742c762bee59c973684f70dfed7de4945d3141e2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6f7eaa47e1de30159277f91f1145a6687f13ffd9",
              "lessThan": "fce36d242a18ddf64731d816a37564103172da11",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6f7eaa47e1de30159277f91f1145a6687f13ffd9",
              "lessThan": "1c0a5c96473b9e7a5f4c453ef6a13dc0f5589a4b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6f7eaa47e1de30159277f91f1145a6687f13ffd9",
              "lessThan": "038e1d126304fd25d507fd4e671232df57bd1799",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/mac80211/tdls.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.17"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "3.17",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/mac80211/tdls.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-10-14T14:17:53.573",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/038e1d126304fd25d507fd4e671232df57bd1799",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1c0a5c96473b9e7a5f4c453ef6a13dc0f5589a4b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6bae6ef511a29ef12ab969adeea691067d4d5d74",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/742c762bee59c973684f70dfed7de4945d3141e2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d0afa5395c46d73ad2090aa50209886e84f179bd",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/fce36d242a18ddf64731d816a37564103172da11",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: require a peer station for TDLS setup confirm\n\nIt's nonsense for the setup confirm to go to station that\ndoesn't even exist, and it hits a warning when building\nthe frame:\n\n  WARN_ON_ONCE(!sta || !ap_sta)\n\nOnly accept WLAN_TDLS_SETUP_CONFIRM when the station is\nalready there as a TDLS station. Need to copy the call\nto ieee80211_tdls_prep_mgmt_packet() since the existing\nWLAN_TDLS_DISCOVERY_REQUEST already falls through to it."
    }
  ],
  "lastModified": "2026-10-19T10:18:47.663",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}