{
  "cveId": "CVE-2025-68263",
  "url": "https://patchblox.com/security/cve/CVE-2025-68263",
  "summary": "CVE-2025-68263 is fixed in linux on 1 platform, first by DEBIAN-CVE-2025-68263, released December 16, 2025. It is not reported as exploited. Patch Radar priority: High.",
  "title": "ksmbd: ipc: fix use-after-free in ipc_msg_send_request",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  ksmbd: ipc: fix use-after-free in ipc_msg_send_request  ipc_msg_send_request() waits for a generic netlink reply using an ipc_msg_table_entry on the stack. The generic netlink handler (handle_generic_event()/handle_response()) fills entry-\u003Eresponse under ipc_msg_table_lock, but ipc_msg_send_request() used to validate and free entry-\u003Eresponse without holding the same lock.  Under high concurrency this allows a race where handle_response() is copying data into entry-\u003Eresponse while ipc_msg_send_request() has just freed it, leading to a slab-use-after-free reported by KASAN in handle_generic_event():    BUG: KASAN: slab-use-after-free in handle_generic_event\u002B0x3c4/0x5f0 [ksmbd]   Write of size 12 at addr ffff888198ee6e20 by task pool/109349   ...   Freed by task:     kvfree     ipc_msg_send_request [ksmbd]     ksmbd_rpc_open -\u003E ksmbd_session_rpc_open [ksmbd]  Fix by: - Taking ipc_msg_table_lock in ipc_msg_send_request() while validating   entry-\u003Eresponse, freeing it when invalid, and removing the entry from   ipc_msg_table. - Returning the final entry-\u003Eresponse pointer to the caller only after   the hash entry is removed under the lock. - Returning NULL in the error path, preserving the original API   semantics.  This makes all accesses to entry-\u003Eresponse consistent with handle_response(), which already updates and fills the response buffer under ipc_msg_table_lock, and closes the race that allowed the UAF.",
  "published": "2025-12-16T15:15:55Z",
  "severity": "Moderate",
  "cvss": 9.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00444,
  "epssPercentile": 0.38796,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-68263",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.162-1",
      "fix": "DEBIAN-CVE-2025-68263",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-68263",
      "released": "2025-12-16T15:15:55Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.63-1",
      "fix": "DEBIAN-CVE-2025-68263",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-68263",
      "released": "2025-12-16T15:15:55Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.17.12-1",
      "fix": "DEBIAN-CVE-2025-68263",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-68263",
      "released": "2025-12-16T15:15:55Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}