{
  "cveId": "CVE-2026-99246",
  "url": "https://patchblox.com/security/cve/CVE-2026-99246",
  "summary": "CVE-2026-99246 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-99246, released November 3, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "tipc: protect node reset trace dump with node lock",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  tipc: protect node reset trace dump with node lock  The tipc_node_reset_links trace event asks tipc_node_dump() to walk the node\u0027s link entries. Unlike the other node events that request link data, this event runs without the node lock.  This permits bearer teardown to free a link while the trace callback is dumping it:    CPU 0                                CPU 1   trace_tipc_node_reset_links()     tipc_node_dump()       l = n-\u003Elinks[0].link                                        tipc_node_write_lock()                                        kfree(l)                                        n-\u003Elinks[0].link = NULL                                        tipc_node_write_unlock()       tipc_link_dump(l)  tipc_link_dump() then dereferences the stale pointer. KASAN reported:    BUG: KASAN: slab-use-after-free in tipc_link_dump   Read of size 4 by task poc/115   Call Trace:    tipc_link_dump\u002B0x10cb/0x16b0    tipc_node_dump\u002B0x4bb/0x740    trace_event_raw_event_tipc_node_class\u002B0x258/0x360    tipc_node_reset_links\u002B0x14d/0x1a0    tipc_rcv\u002B0x13f5/0x3030    tipc_udp_recv\u002B0x4e3/0x670   Allocated by task 0:    tipc_link_create\u002B0x1e1/0x1020    tipc_node_check_dest\u002B0x7d2/0x11a0    tipc_disc_rcv\u002B0xdbf/0x1430   Freed by task 89:    kfree\u002B0x131/0x3c0    tipc_node_link_down\u002B0x267/0x4b0    tipc_node_delete_links\u002B0xec/0x160    bearer_disable\u002B0x107/0x260  Take the node write lock around the trace event. This serializes the dump against tipc_node_link_down(delete=true), which frees the link under the same write lock.",
  "published": "2026-11-03T12:17:31Z",
  "severity": "Important",
  "cvss": 8.1,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00443,
  "epssPercentile": 0.38748,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-99246",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.115-1",
      "fix": "DEBIAN-CVE-2026-99246",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-99246",
      "released": "2026-11-03T18:58:21Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.13-1",
      "fix": "DEBIAN-CVE-2026-99246",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-99246",
      "released": "2026-11-03T18:58:21Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}