{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-53010",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-53010"
  ],
  "published": "2026-06-24T16:31:02Z",
  "summary": "ksmbd: fix use-after-free in smb2_open during durable reconnect",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix use-after-free in smb2_open during durable reconnect\n\nIn smb2_open, the call to ksmbd_put_durable_fd(fp) drops the reference\nto the durable file descriptor early during the durable reconnect\nprocess. If an error occurs subsequently (eg, ksmbd_iov_pin_rsp fails)\nor a scavenger accesses the file, it leads to a use-after-free when\naccessing fp properties (eg fp->create_time).\n\nMove the single put to the end of the function below err_out2 so fp\nstays valid until smb2_open returns.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-53010"
    },
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      "url": "https://git.kernel.org/stable/c/f0ff7f12398e85b3a11745ff7feab6246f3d75c2"
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    "upstream_modified": "2026-09-14T12:06:03Z",
    "severity": {
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      "scenario": "AV:N - ksmbd is an in-kernel SMB server reachable over TCP, and SMB2_CREATE requests are dispatched from network-received SMB packets to smb2_open. The durable reconnect path is therefore remotely reachable over the network.\nAC:L - An attacker can drive the required SMB sequence by creating a durable handle, disconnecting, and sending a durable reconnect request with controlled create contexts. The bug is a use-after-free/lifetime error in the request path, not a race depending on conditions outside the attacker's control.\nPR:N - Although SMB2_CREATE requires a valid session and tree connect, ksmbd supports guest/anonymous users and guest shares, so a reasonable guest-enabled deployment lets an unauthenticated network client satisfy those gates. Scoring uses that highest reasonable exposure.\nUI:N - No victim user action is required once ksmbd is listening and the share is available. The attacker sends SMB protocol messages directly.\nS:U - The vulnerability is in the kernel SMB server and impacts the same kernel/server security authority. It does not cross a VM, IOMMU, or other separate security scope boundary.\nC:H - The bug is a use-after-free of struct ksmbd_file, which contains kernel pointers, file state, IDs, GUIDs, and list links. Kernel UAF memory corruption can be leveraged for information disclosure, so confidentiality impact is high.\nI:H - Use-after-free in kernel heap objects can be exploited through heap shaping and stale pointer reuse to corrupt kernel state or hijack control flow. Integrity impact is therefore high.\nA:H - The stale ksmbd_file can be dereferenced or closed after free on reconnect/error/scavenger paths, which can crash or destabilize the kernel. Availability impact is high."
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}