CVE-2026-64539

Что произошло

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: eir: Fix stack OOB write when prepending the Flags AD eir_create_adv_data() builds the advertising data into a fixed-size buffer ("size", 31 for the legacy path). It may prepend a 3-byte "Flags" AD structure (LE_AD_NO_BREDR on an LE-only controller) and then copies the per-instance data without checking that it still fits: memcpy(ptr, adv->adv_data, adv->adv_data_len); tlv_data_max_len() only reserves those 3 bytes when the user-supplied flags carry a managed-flags bit, so an instance added with flags == 0 is accepted with adv_data_len up to the full buffer. At advertise time the flags are still prepended, and the memcpy() writes 3 + adv_data_len bytes into the size-byte buffer: BUG: KASAN: stack-out-of-bounds in eir_create_adv_data (net/bluetooth/eir.c:301) Write of size 31 at addr ffff88800a547bdc by task kworker/u9:0/65 Workqueue: hci0 hci_cmd_sync_work __asan_memcpy (mm/kasan/shadow.c:106) eir_create_adv_data (net/bluetooth/eir.c:301) hci_update_adv_data_sync (net/bluetooth/hci_sync.c:1310) hci_schedule_adv_instance_sync (net/bluetooth/hci_sync.c:1817) hci_cmd_sync_work (net/bluetooth/hci_sync.c:332) This frame has 1 object: [32, 64) 'cp' The "Flags" structure is added by the kernel, not requested by userspace, so only prepend it when it fits together with the instance advertising data; when there is no room for both, drop the flags rather than the user-provided data. Reachable by a local user with CAP_NET_ADMIN owning an LE-only controller on the legacy advertising path.

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": "b44133ff03be30b55f23036e62f403a3f7784fce",
  "lessThan": "0f0b6232af56441d0a2dcb173cc4f8d8aab39014",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "b44133ff03be30b55f23036e62f403a3f7784fce",
  "lessThan": "9174992ee1045c9c96e53eecda64f49dd7e8fbba",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "b44133ff03be30b55f23036e62f403a3f7784fce",
  "lessThan": "09301f1fdf2aef8cce34d0c4650c30e7edb1ced9",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "b44133ff03be30b55f23036e62f403a3f7784fce",
  "lessThan": "f1b4df9c260c51726da2e86e19322825fddeefd0",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "b44133ff03be30b55f23036e62f403a3f7784fce",
  "lessThan": "57077eeb586c42f124bc09e018449362223067b3",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "b44133ff03be30b55f23036e62f403a3f7784fce",
  "lessThan": "6f5fb689fdf80bdd143f22a502f9eb1f3c85e286",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "4.1"
}

{
  "status": "unaffected",
  "version": "0",
  "lessThan": "4.1",
  "versionType": "semver"
}

{
  "status": "unaffected",
  "version": "6.1.178",
  "versionType": "semver",
  "lessThanOrEqual": "6.1.*"
}

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

{
  "status": "unaffected",
  "version": "6.12.97",
  "versionType": "semver",
  "lessThanOrEqual": "6.12.*"
}

{
  "status": "unaffected",
  "version": "6.18.40",
  "versionType": "semver",
  "lessThanOrEqual": "6.18.*"
}

{
  "status": "unaffected",
  "version": "7.1.5",
  "versionType": "semver",
  "lessThanOrEqual": "7.1.*"
}

{
  "status": "unaffected",
  "version": "7.2",
  "versionType": "original_commit_for_fix",
  "lessThanOrEqual": "*"
}

CVSS: оценки и векторы

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Источники и ссылки

{
  "cwes": [
    "cve",
    "nvd"
  ],
  "epss": {
    "source": "epss",
    "received_at": "2026-11-03T21:14:32.845358+00:00"
  },
  "title": {
    "source": "cve",
    "received_at": "2026-10-28T18:15:16.417276+00:00"
  },
  "scores": [
    "cve",
    "nvd"
  ],
  "status": {
    "source": "cve",
    "received_at": "2026-10-28T18:15:16.417276+00:00"
  },
  "affected": [
    "cve"
  ],
  "published": {
    "source": "cve",
    "received_at": "2026-10-28T18:15:16.417276+00:00"
  },
  "solutions": [],
  "percentile": {
    "source": "epss",
    "received_at": "2026-11-03T21:14:32.845358+00:00"
  },
  "references": [
    "cve",
    "nvd"
  ],
  "description": {
    "source": "cve",
    "received_at": "2026-10-28T18:15:16.417276+00:00"
  },
  "workarounds": [],
  "configurations": []
}

Хронология записи

1. Данные обновлены04.11.2026, 00:14
2. Данные обновлены03.11.2026, 21:45
3. Данные обновлены03.11.2026, 00:13
4. Данные обновлены02.11.2026, 00:12
5. Данные обновлены31.10.2026, 11:59
6. Данные обновлены29.10.2026, 12:36
7. Опубликована28.10.2026, 21:15

Личная заметка и статус

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