CVE-2026-98736

Что произошло

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: Lock parent access during enhanced SCO setup Bluetooth: hci_conn: Lock parent access during enhanced SCO setup hci_enhanced_setup_sync() runs on the request workqueue without the hci_dev_lock held by its caller when setup was queued. Its CVSD capability check and find_next_esco_param() dereference conn->parent while the receive workqueue can unlink and release that parent. The following interleaving can cause a use-after-free: hci_enhanced_setup_sync() hci_disconn_complete_evt() load conn->parent hci_dev_lock() hci_conn_del(ACL parent) unlink SCO child drop link's parent reference clear child->parent release ACL parent bt_link_release() kfree(parent) hci_dev_unlock() read parent->features[0][3] The reference held for the queued SCO child does not keep its ACL parent alive after unlinking. Commit 42de40abe25d ("Bluetooth: hci_conn: fix the SCO setup context lifetime") protects the child stored in the queued context, but leaves these parent accesses unprotected. With a 40 ms diagnostic delay after loading conn->parent, an instrumented kernel based on fd179f8a05be, which already contains 42de40abe25d, BUG: KASAN: slab-use-after-free in hci_enhanced_setup_sync+0xda5/0xdf0 Read of size 1 at addr ffff888102204047 by task kworker/u17:0/93 Call Trace: hci_enhanced_setup_sync+0xda5/0xdf0 hci_cmd_sync_work+0x13c/0x290 process_one_work+0x6b4/0x10e0 Allocated by task 92: __hci_conn_add+0x304/0x1df0 hci_connect_acl+0x349/0x3e0 hci_connect_sco+0x3b/0x9a0 sco_sock_connect+0x475/0xca0 Freed by task 94: kfree+0x121/0x3c0 bt_link_release+0x79/0xa0 device_release+0xc8/0x240 kobject_put+0x14d/0x280 hci_conn_del+0x524/0xe30 hci_disconn_complete_evt+0x403/0x8c0 hci_event_packet+0x71b/0xb20 hci_rx_work+0x293/0x730 The accessed address is 71 bytes into the freed ACL parent, at its features[0][3] byte; the queued SCO child is a different object. The diagnostic preserves the loaded parent across the delay, matching the unmodified compiled capability check, and does not change the parent references or teardown path. Hold hci_dev_lock() across the codec switch, including every call to find_next_esco_param(), and release it on all selection errors. Keep configure_datapath_sync() outside the critical section because it waits for HCI events. Preserve parameter selection and existing return values.

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": "e07a06b4eb417f5271d33ce2240e93c62d98b7b4",
  "lessThan": "48bf3b94c7331e11eaa6c89adc054a7bc7c0382e",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "e07a06b4eb417f5271d33ce2240e93c62d98b7b4",
  "lessThan": "70b55855eecb428d446344d827bda8725ce8b312",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "e07a06b4eb417f5271d33ce2240e93c62d98b7b4",
  "lessThan": "1239ef0fa809b5952fca679db3faa3e1c00e1dac",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "e07a06b4eb417f5271d33ce2240e93c62d98b7b4",
  "lessThan": "cabd58d9bb66d49d481f762ce986173db397435d",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "e07a06b4eb417f5271d33ce2240e93c62d98b7b4",
  "lessThan": "93a737e4e042f59673cd580d35214f278d7b757d",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "e07a06b4eb417f5271d33ce2240e93c62d98b7b4",
  "lessThan": "024e05f73a4c1263d031614bc36700ec135eecb4",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "6.1"
}

{
  "status": "unaffected",
  "version": "0",
  "lessThan": "6.1",
  "versionType": "semver"
}

{
  "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": "6.18.56",
  "versionType": "semver",
  "lessThanOrEqual": "6.18.*"
}

{
  "status": "unaffected",
  "version": "7.2.10",
  "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": "2026-11-03T21:16:07.941996+00:00"
  },
  "title": {
    "source": "cve",
    "received_at": "2026-10-30T12:57:41.890973+00:00"
  },
  "scores": [],
  "status": {
    "source": "cve",
    "received_at": "2026-10-30T12:57:41.890973+00:00"
  },
  "affected": [
    "cve"
  ],
  "published": {
    "source": "cve",
    "received_at": "2026-10-30T12:57:41.890973+00:00"
  },
  "solutions": [],
  "percentile": {
    "source": "epss",
    "received_at": "2026-11-03T21:16:07.941996+00:00"
  },
  "references": [
    "cve",
    "ghsa",
    "nvd"
  ],
  "description": {
    "source": "cve",
    "received_at": "2026-10-30T12:57:41.890973+00:00"
  },
  "workarounds": [],
  "configurations": []
}

Хронология записи

1. Данные обновлены04.11.2026, 00:16
2. Данные обновлены03.11.2026, 00:15
3. Данные обновлены02.11.2026, 00:13
4. Данные обновлены31.10.2026, 12:00
5. Данные обновлены30.10.2026, 20:51
6. Данные обновлены30.10.2026, 15:58
7. Данные обновлены29.10.2026, 12:47
8. Опубликована28.10.2026, 23:15

Личная заметка и статус

Другие CVE того же продукта