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CVE-2026-74367 (GCVE-0-2026-74367)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:58 – Updated: 2026-08-17 05:46
VLAI
Title
wifi: ath12k: fix inconsistent arvif state in vdev_create error paths
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: fix inconsistent arvif state in vdev_create error paths ath12k_mac_vdev_create() has three error path issues that leave arvif in an inconsistent state: 1. When ath12k_wmi_vdev_create() fails, the function returns directly without clearing arvif->ar, which was already set before the WMI call. Subsequent code checking arvif->ar to determine vdev readiness will see a non-NULL value despite no vdev existing in firmware. 2. When ath12k_wmi_send_peer_delete_cmd() fails in err_peer_del, the code jumped to err: skipping the DP peer cleanup and vdev rollback, leaving num_created_vdevs, vdev maps and arvif list membership live. 3. When ath12k_wait_for_peer_delete_done() fails, the code jumped to err_vdev_del: skipping the DP peer cleanup. Fix by changing the ath12k_wmi_vdev_create() failure to goto err instead of returning directly, routing both err_peer_del failure paths through err_dp_peer_del: for proper DP peer and vdev rollback, and consolidating the arvif state cleanup at err:. Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00302-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.115823.3
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 477cabfdb776b571fab425813c074f30c02a5cf6 , < e0140e094b196d92f2a4ce167ee73cbfab000290 (git)
Affected: 477cabfdb776b571fab425813c074f30c02a5cf6 , < c972636efc63f0f43d725b59805dd1ae5bc4b31e (git)
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Linux Linux Affected: 6.13
Unaffected: 0 , < 6.13 (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/ath/ath12k/mac.c"
          ],
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                  "vulnerable": true
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath12k: fix inconsistent arvif state in vdev_create error paths\n\nath12k_mac_vdev_create() has three error path issues that leave arvif\nin an inconsistent state:\n\n1. When ath12k_wmi_vdev_create() fails, the function returns directly\n   without clearing arvif-\u003ear, which was already set before the WMI\n   call. Subsequent code checking arvif-\u003ear to determine vdev readiness\n   will see a non-NULL value despite no vdev existing in firmware.\n\n2. When ath12k_wmi_send_peer_delete_cmd() fails in err_peer_del, the\n   code jumped to err: skipping the DP peer cleanup and vdev rollback,\n   leaving num_created_vdevs, vdev maps and arvif list membership live.\n\n3. When ath12k_wait_for_peer_delete_done() fails, the code jumped to\n   err_vdev_del: skipping the DP peer cleanup.\n\nFix by changing the ath12k_wmi_vdev_create() failure to goto err instead\nof returning directly, routing both err_peer_del failure paths through\nerr_dp_peer_del: for proper DP peer and vdev rollback, and consolidating\nthe arvif state cleanup at err:.\n\nTested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00302-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.115823.3"
        }
      ],
      "metrics": [
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          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - ath12k_mac_vdev_create() is only reached from mac80211 driver callbacks (assign_vif_chanctx, hw_scan, remain_on_channel) invoked by nl80211/generic-netlink WiFi management commands, not from remote WiFi frame processing.\nAC:L - An attacker with CAP_NET_ADMIN can repeatedly create AP/scan interfaces and race teardown to stress firmware WMI commands, reliably provoking vdev_create or peer-delete failures/timeouts on error rollback paths they control.\nPR:L - Triggering vdev creation requires nl80211 operations (NEW_INTERFACE, START_AP, TRIGGER_SCAN) gated by GENL_UNS_ADMIN_PERM; this capability is obtainable by an unprivileged user inside a user+network namespace via unshare -Urn.\nUI:N - Exploitation requires no action by another user; the attacker directly issues the nl80211 interface/scan operations that drive ath12k_mac_vdev_create() and its faulty error paths.\nS:U - The bug corrupts ath12k driver/kernel state on the same host; it does not cross a VM, container, or IOMMU security boundary to affect a separate security authority.\nC:H - Incomplete rollback leaves orphaned DP peers and stale vdev/arvif bookkeeping while firmware objects remain live, enabling heap corruption that can be leveraged for arbitrary kernel memory reads.\nI:H - Inconsistent is_created, vdev maps, and arvif list membership with uncleared DP peers permits subsequent driver operations on stale objects, enabling heap corruption and potential arbitrary kernel write or code execution.\nA:H - Error paths can leave is_created true with arvif-\u003ear NULL while the arvif stays on arvifs; later nl80211-driven callbacks dereference arvif-\u003ear unchecked, causing kernel NULL pointer oops/panic and persistent WiFi DoS."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:46:25.345Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e0140e094b196d92f2a4ce167ee73cbfab000290"
        },
        {
          "url": "https://git.kernel.org/stable/c/c972636efc63f0f43d725b59805dd1ae5bc4b31e"
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      ],
      "title": "wifi: ath12k: fix inconsistent arvif state in vdev_create error paths",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74367",
    "datePublished": "2026-08-15T05:58:48.938Z",
    "dateReserved": "2026-08-15T05:44:03.888Z",
    "dateUpdated": "2026-08-17T05:46:25.345Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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      "date": "2026-09-04",
      "epss": "0.0012",
      "percentile": "0.02076"
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-20T20:57:15+00:00",
      "cve": "CVE-2026-74367",
      "id": "CVE-2026-74367",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: ath12k: fix inconsistent arvif state in vdev_create error paths",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74367.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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