{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-90343",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-90343"
  ],
  "published": "2026-09-17T16:10:40Z",
  "summary": "wifi: cfg80211: stop PMSR before P2P and NAN teardown",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: stop PMSR before P2P and NAN teardown\n\nPMSR request teardown must abort active measurements while the\nwireless_dev is still present in the driver. cfg80211_leave_locked() and\ncfg80211_stop_pd() already do this before invoking the driver's stop\ncallback, but cfg80211_stop_p2p_device() and cfg80211_stop_nan() do not.\n\nThose helpers are also called directly by nl80211, rfkill shutdown, and\nwireless_dev unregister paths. If one of these paths stops a P2P device\nor NAN interface with a pending request, it removes the mac80211\nsubinterface from the driver first. Subsequent request cleanup cannot\nreach the lower driver's abort callback, but cfg80211 frees the request\nregardless. Driver state can then retain a stale request and use it when\nit later reports a result.\n\nCall cfg80211_pmsr_wdev_down() before stopping the P2P device or NAN\ninterface. This keeps lower-driver request state and cfg80211 request\nownership in sync for all of the helpers' callers.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
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  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-90343"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7a22cbc6c6bdd3c3811b4ce13875685c520f94de"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/db3439ad11ac5e52decdefe784c98b21c3757848"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6c5fc504d0d6934132637aa3db4b9b58148eaa78"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-18T17:55:42Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 7.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:L - The UAF is created when nl80211_stop_p2p_device() or nl80211_stop_nan() (also cfg80211_shutdown_all_interfaces() and _cfg80211_unregister_wdev()) call cfg80211_stop_p2p_device()/cfg80211_stop_nan() with a pending cfg80211_pmsr_request still on wdev->pmsr_list; those paths are local generic-netlink/rfkill/unregister, not parsing of a received 802.11/FTM frame.\nAC:L - The attacker issues NL80211_CMD_PEER_MEASUREMENT_START (iwlwifi stores mvm->ftm_initiator.req; hwsim stores data->pmsr_request), then NL80211_CMD_STOP_P2P_DEVICE so drv_remove_interface() clears IEEE80211_SDATA_IN_DRIVER, then closes the socket so nl80211_netlink_notify()->cfg80211_release_pmsr() kfree()s the request while drv_abort_pmsr() returns without calling the driver.\nPR:L - NL80211_CMD_NEW_INTERFACE, NL80211_CMD_START_P2P_DEVICE, NL80211_CMD_PEER_MEASUREMENT_START and NL80211_CMD_STOP_P2P_DEVICE are GENL_UNS_ADMIN_PERM, checked as netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN); an unprivileged user obtains that via unshare -Urn. (STOP_NAN is GENL_ADMIN_PERM, but the P2P path is sufficient.)\nUI:N - The attacker creates/starts the P2P_DEVICE wdev, starts the PMSR request, stops it via NL80211_CMD_STOP_P2P_DEVICE, and closes their own nl80211 socket; no other user must associate, mount, or confirm anything.\nS:U - The dangling cfg80211_pmsr_request is used in-process by iwl_mvm_ftm_range_resp()/iwl_mvm_ftm_restart() and cfg80211_pmsr_report() in the same kernel; this does not cross a VM, IOMMU, or sandbox boundary.\nC:H - After kfree(req) in cfg80211_pmsr_process_abort(), iwl_mvm_ftm_range_resp() and iwl_mvm_ftm_restart() still load mvm->ftm_initiator.req->cookie, n_peers and peers[].addr and pass the object to cfg80211_pmsr_report(); that heap UAF is an arbitrary read primitive.\nI:H - The same stale ftm_initiator.req / hwsim pmsr_request is later passed to cfg80211_pmsr_complete() (list_del on the freed object) and used as live driver state, giving a heap write/control-flow hijack primitive from the UAF.\nA:H - iwl_mvm_ftm_range_resp() dereferences the freed cfg80211_pmsr_request when firmware later delivers a TOF range response (or iwl_mvm_ftm_restart() on FW restart), which oopses the kernel even without a full exploit."
    }
  }
}