{
  "cveId": "CVE-2026-98737",
  "url": "https://patchblox.com/security/cve/CVE-2026-98737",
  "summary": "CVE-2026-98737 is fixed in 12 products on 1 platform, first by DEBIAN-CVE-2026-98737, released October 19, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Bluetooth: hci_sync: Fix inquiry cache use-after-free",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  Bluetooth: hci_sync: Fix inquiry cache use-after-free  The sync command worker holds hdev-\u003Ereq_lock, but inquiry-cache updates and flushes use hdev-\u003Elock. Both hci_acl_create_conn_sync() and hci_stop_discovery_sync() look up entries and read their fields without taking hdev-\u003Elock.  After either lookup returns, a concurrent HCIINQUIRY ioctl can acquire hdev-\u003Elock and flush the cache, freeing the entry. The worker then reads the freed entry while preparing a create-connection or remote-name-cancel command. The list traversal also races with cache updates and removal.  KASAN reported these accesses:    BUG: KASAN: slab-use-after-free in hci_acl_create_conn_sync\u002B0x5f1/0x650   Workqueue: hci0 hci_cmd_sync_work   Call Trace:    hci_acl_create_conn_sync\u002B0x5f1/0x650    hci_cmd_sync_work\u002B0x13c/0x290    Allocated by task 90:    hci_inquiry_cache_update\u002B0x3e6/0x7d0    hci_inquiry_result_evt\u002B0x3cb/0x560    Freed by task 93:    hci_inquiry_cache_flush\u002B0x111/0x2b0    hci_inquiry\u002B0x2f2/0x780    hci_sock_ioctl\u002B0x269/0x5f0    BUG: KASAN: slab-use-after-free in hci_stop_discovery_sync\u002B0x3b1/0x3c0   Workqueue: hci0 hci_cmd_sync_work   Call Trace:    hci_stop_discovery_sync\u002B0x3b1/0x3c0    hci_cmd_sync_work\u002B0x173/0x300    Allocated by task 86:    hci_inquiry_cache_update\u002B0x483/0x940    hci_inquiry_result_evt\u002B0x3cb/0x560    Freed by task 91:    hci_inquiry_cache_flush\u002B0x13e/0x2f0    hci_inquiry\u002B0x2f2/0x780    hci_sock_ioctl\u002B0x269/0x5f0  Hold hdev-\u003Elock across each lookup and all reads from its result. Copy the remote address before unlocking so discovery cancellation does not retain a cache entry pointer. Release the lock before sending synchronous HCI commands, since their completion handlers may need the same lock.",
  "published": "2026-10-18T16:17:27Z",
  "severity": "Important",
  "cvss": 7.1,
  "epss": 0.002,
  "epssPercentile": 0.09889,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98737",
  "fixes": [
    {
      "platform": "linux",
      "product": "kernel-64kb",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.90.1",
      "fix": "SUSE-SU-2026:5091-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5091-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "kernel-azure",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.90.1",
      "fix": "SUSE-SU-2026:5091-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5091-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "kernel-default",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.90.1",
      "fix": "SUSE-SU-2026:5091-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5091-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "kernel-default-base",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.90.1.150700.17.51.1",
      "fix": "SUSE-SU-2026:5091-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5091-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "kernel-docs",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.90.1",
      "fix": "SUSE-SU-2026:5091-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5091-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-SLE15-SP7_Update_24",
      "release": "sles 15.7",
      "fixedVersion": "1-150700.15.3.1",
      "fix": "SUSE-SU-2026:5091-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5091-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "kernel-obs-build",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.90.1",
      "fix": "SUSE-SU-2026:5091-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5091-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "kernel-source",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.90.1",
      "fix": "SUSE-SU-2026:5091-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5091-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "kernel-syms",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.90.1",
      "fix": "SUSE-SU-2026:5091-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5091-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "kernel-zfcpdump",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.90.1",
      "fix": "SUSE-SU-2026:5091-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5091-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.113-1",
      "fix": "DEBIAN-CVE-2026-98737",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98737",
      "released": "2026-10-19T16:27:52Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.10-1",
      "fix": "DEBIAN-CVE-2026-98737",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98737",
      "released": "2026-10-19T16:27:52Z"
    },
    {
      "platform": "linux",
      "product": "linux-6.12",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.12.113-1~deb12u1",
      "fix": "DEBIAN-CVE-2026-98737",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98737",
      "released": "2026-10-19T16:27:52Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}