CVE-2026-99061

Что произошло

In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: fix P2P device removal race in brcmf_detach() When the driver is removed while the user space process that created the P2P device (e.g. wpa_supplicant) is still exiting, the P2P device interface is removed twice and the kernel crashes. The two paths are: - wpa_supplicant, on exit, sends NL80211_CMD_DEL_INTERFACE for the P2P device. nl80211_del_interface() holds RTNL and the wiphy mutex and calls brcmf_p2p_del_vif(), which disables discovery and waits up to 1.5 s for BRCMF_E_IF_DEL. Then it calls brcmf_remove_interface(), which unregisters the wdev and frees the vif and the ifp. - brcmf_detach() sets the bus down, so BRCMF_E_IF_DEL never arrives, and calls brcmf_remove_interface(ifp, false) for the same ifp. brcmf_p2p_ifp_removed() reads ifp->vif and then blocks on rtnl_lock(). When brcmf_p2p_del_vif() releases RTNL, it calls cfg80211_unregister_wdev() on the wdev that was already unregistered and freed. The second list_del_rcu() of wdev->list faults on LIST_POISON2: brcmfmac: brcmf_p2p_del_vif delete P2P vif brcmfmac: brcmf_p2p_deinit_discovery enter brcmfmac: brcmf_p2p_del_vif P2P: GO_NEG_PHASE status cleared brcmfmac: brcmf_detach Enter brcmfmac: brcmf_bus_change_state 1 -> 0 brcmfmac: brcmf_remove_interface Enter, bsscfgidx=1, ifidx=0 brcmfmac: brcmf_del_if Enter, bsscfgidx=1, ifidx=0 brcmfmac: brcmf_p2p_ifp_removed P2P: device interface removed [1.5 s later, brcmf_p2p_del_vif() timed out] brcmfmac: brcmf_remove_interface Enter, bsscfgidx=1, ifidx=0 brcmfmac: brcmf_del_if Enter, bsscfgidx=1, ifidx=0 brcmfmac: brcmf_p2p_ifp_removed P2P: device interface removed Unable to handle kernel paging request at virtual address dead000000000122 Internal error: Oops: 96000044 [#1] PREEMPT_RT SMP pc : _cfg80211_unregister_wdev+0x6c/0x264 [cfg80211] Call trace: _cfg80211_unregister_wdev+0x6c/0x264 [cfg80211] cfg80211_unregister_wdev+0x10/0x1c [cfg80211] brcmf_p2p_ifp_removed+0x84/0xb0 [brcmfmac] brcmf_remove_interface+0x1f4/0x254 [brcmfmac] brcmf_detach+0x88/0x180 [brcmfmac] brcmf_sdio_remove+0x90/0x7b0 [brcmfmac] brcmf_sdiod_remove+0x20/0xa0 [brcmfmac] brcmf_ops_sdio_remove+0xbc/0x12c [brcmfmac] sdio_bus_remove+0x38/0x144 device_release_driver_internal+0x1e8/0x2c0 device_release_driver+0x14/0x20 brcmf_sdio_bus_remove+0x2c/0x40 [brcmfmac] brcmf_fwvid_unregister_vendor+0xd8/0x170 [brcmfmac] __exit_compat+0x18/0x418 [brcmfmac_cyw] __arm64_sys_delete_module+0x1ac/0x244 The log was taken with debug=0x406 on an i.MX 8M Plus board with a CYW55513 (Sona IF513) on SDIO. The driver is the Ezurio backport of brcmfmac from v6.18.22 on a 5.4-rt kernel. The code involved is the same in mainline. To reproduce: 1. Start wpa_supplicant on wlan0 and let it associate. It creates the P2P device (iw dev shows "type P2P-device"). 2. Stop wpa_supplicant and remove the driver without waiting for wpa_supplicant to exit: kill $(pidof wpa_supplicant) rmmod brcmfmac_cyw brcmfmac The crash is reproducible on that board. For the interface without a netdev (the P2P device), take RTNL and the wiphy mutex in brcmf_detach() before reading iflist, and remove it with locked=true. If brcmf_p2p_del_vif() runs first, brcmf_detach() finds the slot empty. If brcmf_detach() runs first, nl80211 does not find the wdev any more. The interfaces with a netdev are removed as before, because brcmf_del_if() takes RTNL on its own for the primary interface.

Что делать

dpkg-query -W -f='${Package}	${Version}\n'

rpm -qa --qf '%{NAME}\t%{VERSION}-%{RELEASE}\n'

Get-HotFix | Select-Object HotFixID, InstalledOn

Продукты и затронутые версии

{
  "status": "affected",
  "version": "9831bcb987df4aff6a1d85975f1dda4c654f298d",
  "lessThan": "75e917473e20dea61f837f9afb5fc3435c9200d2",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "9831bcb987df4aff6a1d85975f1dda4c654f298d",
  "lessThan": "c4c0659eb74f807e0e73742b101a07b0bb703d97",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "9831bcb987df4aff6a1d85975f1dda4c654f298d",
  "lessThan": "0f84eec09039deb9229fd35c55912a2397d3ae55",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "9831bcb987df4aff6a1d85975f1dda4c654f298d",
  "lessThan": "7b79131e357c4786765b20a994ad40d4d35f2163",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "9831bcb987df4aff6a1d85975f1dda4c654f298d",
  "lessThan": "2e0c8c60a11b3177e7432c71d41249e276a0825f",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "9831bcb987df4aff6a1d85975f1dda4c654f298d",
  "lessThan": "eef16a74ff8ed2a838d6bb862bb2c7783fce7466",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "9831bcb987df4aff6a1d85975f1dda4c654f298d",
  "lessThan": "47ca6395a1d91545cc9403f9218bc61be941a0c3",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "9831bcb987df4aff6a1d85975f1dda4c654f298d",
  "lessThan": "08a3f02fea636e97a7422d1512f76dacdb5b0887",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "4.4"
}

{
  "status": "unaffected",
  "version": "0",
  "lessThan": "4.4",
  "versionType": "semver"
}

{
  "status": "unaffected",
  "version": "5.10.273",
  "versionType": "semver",
  "lessThanOrEqual": "5.10.*"
}

{
  "status": "unaffected",
  "version": "5.15.224",
  "versionType": "semver",
  "lessThanOrEqual": "5.15.*"
}

{
  "status": "unaffected",
  "version": "6.1.191",
  "versionType": "semver",
  "lessThanOrEqual": "6.1.*"
}

{
  "status": "unaffected",
  "version": "6.6.160",
  "versionType": "semver",
  "lessThanOrEqual": "6.6.*"
}

{
  "status": "unaffected",
  "version": "6.12.113",
  "versionType": "semver",
  "lessThanOrEqual": "6.12.*"
}

{
  "status": "unaffected",
  "version": "6.18.57",
  "versionType": "semver",
  "lessThanOrEqual": "6.18.*"
}

{
  "status": "unaffected",
  "version": "7.2.11",
  "versionType": "semver",
  "lessThanOrEqual": "7.2.*"
}

{
  "status": "unaffected",
  "version": "7.3",
  "versionType": "original_commit_for_fix",
  "lessThanOrEqual": "*"
}

CVSS: оценки и векторы

Оценка CVSS отсутствует.

Источники и ссылки

{
  "cwes": [],
  "epss": {
    "source": "epss",
    "received_at": "2026-11-02T21:15:49.091233+00:00"
  },
  "title": {
    "source": "cve",
    "received_at": "2026-10-30T12:57:41.978852+00:00"
  },
  "scores": [],
  "status": {
    "source": "cve",
    "received_at": "2026-10-30T12:57:41.978852+00:00"
  },
  "affected": [
    "cve"
  ],
  "published": {
    "source": "cve",
    "received_at": "2026-10-30T12:57:41.978852+00:00"
  },
  "solutions": [],
  "percentile": {
    "source": "epss",
    "received_at": "2026-11-02T21:15:49.091233+00:00"
  },
  "references": [
    "cve",
    "ghsa",
    "nvd"
  ],
  "description": {
    "source": "cve",
    "received_at": "2026-10-30T12:57:41.978852+00:00"
  },
  "workarounds": [],
  "configurations": []
}

Хронология записи

1. Данные обновлены03.11.2026, 00:15
2. Данные обновлены02.11.2026, 00:13
3. Данные обновлены31.10.2026, 12:00
4. Данные обновлены30.10.2026, 20:51
5. Данные обновлены30.10.2026, 15:58
6. Данные обновлены29.10.2026, 12:47
7. Опубликована28.10.2026, 23:53

Личная заметка и статус

Другие CVE того же продукта