{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.113-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.2.10-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "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+0x5f1/0x650   Workqueue: hci0 hci_cmd_sync_work   Call Trace:    hci_acl_create_conn_sync+0x5f1/0x650    hci_cmd_sync_work+0x13c/0x290    Allocated by task 90:    hci_inquiry_cache_update+0x3e6/0x7d0    hci_inquiry_result_evt+0x3cb/0x560    Freed by task 93:    hci_inquiry_cache_flush+0x111/0x2b0    hci_inquiry+0x2f2/0x780    hci_sock_ioctl+0x269/0x5f0    BUG: KASAN: slab-use-after-free in hci_stop_discovery_sync+0x3b1/0x3c0   Workqueue: hci0 hci_cmd_sync_work   Call Trace:    hci_stop_discovery_sync+0x3b1/0x3c0    hci_cmd_sync_work+0x173/0x300    Allocated by task 86:    hci_inquiry_cache_update+0x483/0x940    hci_inquiry_result_evt+0x3cb/0x560    Freed by task 91:    hci_inquiry_cache_flush+0x13e/0x2f0    hci_inquiry+0x2f2/0x780    hci_sock_ioctl+0x269/0x5f0  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.",
  "id": "DEBIAN-CVE-2026-98737",
  "modified": "2026-10-19T04:47:28.140228546Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-98737"
    }
  ],
  "upstream": [
    "CVE-2026-98737"
  ]
}