CVE-2026-98936 (GCVE-0-2026-98936)

Vulnerability from cvelistv5 – Published: 2026-10-23 12:11 – Updated: 2026-10-23 12:11
VLAI
Title
wifi: ath11k: reset ar->num_stations on hardware start
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: reset ar->num_stations on hardware start When (multiple) hw restart occurs, we end up in a situation where we cannot accept new stations / mesh peers. This seems to be the 'num_stations' in 'struct ath11k' that did not get reset properly in this case. In ath11k_mac_op_start(), it was indeed the only accounting var that did not get reset so let's clear it too. This avoids problems like those: [1248828.088023] WARNING: CPU: 0 PID: 12281 at net/mac80211/util.c:1682 ieee80211_reconfig_stations+0x98/0xc0 [1248828.088115] Call trace: [1248828.088116] ieee80211_reconfig_stations+0x98/0xc0 (P) [1248828.088119] ieee80211_reconfig+0x774/0x1438 [1248828.088123] ieee80211_restart_work+0x10c/0x178 [1248828.088127] process_one_work+0x178/0x3c0 [1248828.088130] worker_thread+0x280/0x440 [1248828.088133] kthread+0xe0/0xf8 [1248828.088137] ret_from_fork+0x10/0x20 [1248828.088141] ---[ end trace 0000000000000000 ]--- [1248836.686604] ath11k_pci 0000:04:00.0: refusing to associate station: too many connected already (128) [1248836.686609] ath11k_pci 0000:04:00.0: Failed to add station: xx:xx:xx:xx:xx:xx for VDEV: 1 Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.9.0.1-01977-QCAHKSWPL_SILICONZ-1
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7067 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d5c65159f2895379e11ca13f62feabe93278985d , < 60142eb2afda34508e640a3ff2a54c90e51525cc (git)
Affected: d5c65159f2895379e11ca13f62feabe93278985d , < c3ac51701e925e8d50479ae2fddca51a09f636e8 (git)
Affected: d5c65159f2895379e11ca13f62feabe93278985d , < 9a9467f7cc633b31e4c34a2c56aa095e0c3fa853 (git)
Affected: d5c65159f2895379e11ca13f62feabe93278985d , < c27779d3679c695674747744390f97a5424a0dc8 (git)
Affected: d5c65159f2895379e11ca13f62feabe93278985d , < 7e0ad05ebc72fffba2bdf2400400902d94ed7272 (git)
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Linux Linux Affected: 5.6
Unaffected: 0 , < 5.6 (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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Show details on NVD website
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{
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          "product": "Linux",
          "programFiles": [
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          "vendor": "Linux",
          "versions": [
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              "versionType": "semver"
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              "versionType": "semver"
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              "version": "6.18.56",
              "versionType": "semver"
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              "version": "7.2.10",
              "versionType": "semver"
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              "version": "7.3",
              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
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                  "versionStartIncluding": "5.6",
                  "vulnerable": true
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath11k: reset ar-\u003enum_stations on hardware start\n\nWhen (multiple) hw restart occurs, we end up in a situation where we\ncannot accept new stations / mesh peers. This seems to be the\n\u0027num_stations\u0027 in \u0027struct ath11k\u0027 that did not get reset properly in\nthis case. In ath11k_mac_op_start(), it was indeed the only accounting var\nthat did not get reset so let\u0027s clear it too.\n\nThis avoids problems like those:\n\n\t[1248828.088023] WARNING: CPU: 0 PID: 12281 at net/mac80211/util.c:1682 ieee80211_reconfig_stations+0x98/0xc0\n\t[1248828.088115] Call trace:\n\t[1248828.088116]  ieee80211_reconfig_stations+0x98/0xc0 (P)\n\t[1248828.088119]  ieee80211_reconfig+0x774/0x1438\n\t[1248828.088123]  ieee80211_restart_work+0x10c/0x178\n\t[1248828.088127]  process_one_work+0x178/0x3c0\n\t[1248828.088130]  worker_thread+0x280/0x440\n\t[1248828.088133]  kthread+0xe0/0xf8\n\t[1248828.088137]  ret_from_fork+0x10/0x20\n\t[1248828.088141] ---[ end trace 0000000000000000 ]---\n\t[1248836.686604] ath11k_pci 0000:04:00.0: refusing to associate station: too many connected already (128)\n\t[1248836.686609] ath11k_pci 0000:04:00.0: Failed to add station: xx:xx:xx:xx:xx:xx for VDEV: 1\n\nTested-on: QCN9074 hw1.0 PCI WLAN.HK.2.9.0.1-01977-QCAHKSWPL_SILICONZ-1"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-23T12:11:48.632Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/60142eb2afda34508e640a3ff2a54c90e51525cc"
        },
        {
          "url": "https://git.kernel.org/stable/c/c3ac51701e925e8d50479ae2fddca51a09f636e8"
        },
        {
          "url": "https://git.kernel.org/stable/c/9a9467f7cc633b31e4c34a2c56aa095e0c3fa853"
        },
        {
          "url": "https://git.kernel.org/stable/c/c27779d3679c695674747744390f97a5424a0dc8"
        },
        {
          "url": "https://git.kernel.org/stable/c/7e0ad05ebc72fffba2bdf2400400902d94ed7272"
        }
      ],
      "title": "wifi: ath11k: reset ar-\u003enum_stations on hardware start",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98936",
    "datePublished": "2026-10-23T12:11:48.632Z",
    "dateReserved": "2026-09-25T10:25:14.381Z",
    "dateUpdated": "2026-10-23T12:11:48.632Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
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      "date": "2026-10-26",
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      "percentile": "0.06108"
    },
    "microsoft_vex": {
      "current_release_date": "2026-10-25T01:01:47.000Z",
      "cve": "CVE-2026-98936",
      "id": "msrc_CVE-2026-98936",
      "initial_release_date": "2026-10-24T01:08:43.000Z",
      "product_status:under_investigation": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "wifi: ath11k: reset ar-\u003enum_stations on hardware start",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-98936.json",
      "version": "2"
    },
    "nvd": {
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                "product": "Linux",
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                ],
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath11k: reset ar-\u003enum_stations on hardware start\n\nWhen (multiple) hw restart occurs, we end up in a situation where we\ncannot accept new stations / mesh peers. This seems to be the\n\u0027num_stations\u0027 in \u0027struct ath11k\u0027 that did not get reset properly in\nthis case. In ath11k_mac_op_start(), it was indeed the only accounting var\nthat did not get reset so let\u0027s clear it too.\n\nThis avoids problems like those:\n\n\t[1248828.088023] WARNING: CPU: 0 PID: 12281 at net/mac80211/util.c:1682 ieee80211_reconfig_stations+0x98/0xc0\n\t[1248828.088115] Call trace:\n\t[1248828.088116]  ieee80211_reconfig_stations+0x98/0xc0 (P)\n\t[1248828.088119]  ieee80211_reconfig+0x774/0x1438\n\t[1248828.088123]  ieee80211_restart_work+0x10c/0x178\n\t[1248828.088127]  process_one_work+0x178/0x3c0\n\t[1248828.088130]  worker_thread+0x280/0x440\n\t[1248828.088133]  kthread+0xe0/0xf8\n\t[1248828.088137]  ret_from_fork+0x10/0x20\n\t[1248828.088141] ---[ end trace 0000000000000000 ]---\n\t[1248836.686604] ath11k_pci 0000:04:00.0: refusing to associate station: too many connected already (128)\n\t[1248836.686609] ath11k_pci 0000:04:00.0: Failed to add station: xx:xx:xx:xx:xx:xx for VDEV: 1\n\nTested-on: QCN9074 hw1.0 PCI WLAN.HK.2.9.0.1-01977-QCAHKSWPL_SILICONZ-1"
          }
        ],
        "id": "CVE-2026-98936",
        "lastModified": "2026-10-23T13:17:14.490",
        "metrics": {},
        "published": "2026-10-23T13:17:14.490",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/60142eb2afda34508e640a3ff2a54c90e51525cc"
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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