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CriticalFix available

ksmbd: fix use-after-free in smb2_open during durable reconnect

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in smb2_open during durable reconnect In smb2_open, the call to ksmbd_put_durable_fd(fp) drops the reference to the durable file descriptor early during the durable reconnect process. If an error occurs subsequently (eg, ksmbd_iov_pin_rsp fails) or a scavenger accesses the file, it leads to a use-after-free when accessing fp properties (eg fp->create_time). Move the single put to the end of the function below err_out2 so fp stays valid until smb2_open returns.

Products
Kernel
Affected versions
Not specified
Fixed versions
6.12.110, 6.18.33, 6.6.157, 7.0.10
CVEs
CVE-2026-53010
Confirmed fixed CVEs
Not specified
Updated in this feed
8 Nov 2026, 00:45 UTC · Revision 1

Source evidence

ksmbd: fix use-after-free in smb2_open during durable reconnect

core-osv · Original source

Published 24 Jun 2026, 16:29 UTC

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in smb2_open during durable reconnect In smb2_open, the call to ksmbd_put_durable_fd(fp) drops the reference to the durable file descriptor early during the durable reconnect process. If an error occurs subsequently (eg, ksmbd_iov_pin_rsp fails) or a scavenger accesses the file, it leads to a use-after-free when accessing fp properties (eg fp->create_time). Move the single put to the end of the function below err_out2 so fp stays valid until smb2_open returns.

osv:CVE-2026-53010

Kernel

Fixed versions: 6.6.157, 6.12.110, 6.18.33, 7.0.10

Complete source record
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  "url": "https://osv.dev/vulnerability/CVE-2026-53010",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ksmbd: fix use-after-free in smb2_open during durable reconnect",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in smb2_open during durable reconnect In smb2_open, the call to ksmbd_put_durable_fd(fp) drops the reference to the durable file descriptor early during the durable reconnect process. If an error occurs subsequently (eg, ksmbd_iov_pin_rsp fails) or a scavenger accesses the file, it leads to a use-after-free when accessing fp properties (eg fp->create_time). Move the single put to the end of the function below err_out2 so fp stays valid until smb2_open returns.",
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      ],
      "modified": "2026-10-28T02:30:52.478849486Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1baff47b81f94f9231c91236aa511420d0e266b9",
        "https://git.kernel.org/stable/c/4db3dcac84c2f14a45ae201efb38de1fb1bfc009",
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      "provider_metadata": {
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  "source_id": "core-osv",
  "document_id": 521071,
  "published_at": "2026-06-24T16:29:21.211+00:00"
}