---
id: CVE-2026-53010
title: |-
  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 e…
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 e…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-416
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 6.6.32, < 6.7'
  - 'linux_kernel >= 6.9, < 6.18.33'
  - 'linux_kernel >= 6.19, < 7.0.10'
patched:
  - linux_kernel 7.0.10
published: '2026-06-24'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T12:17:42.870'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-53010'
references:
  - url: 'https://git.kernel.org/stable/c/1baff47b81f94f9231c91236aa511420d0e266b9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4db3dcac84c2f14a45ae201efb38de1fb1bfc009'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/97a0cd55283b4e63fd92804da91c8d9896adcad9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ce2e164c1c51c3f7813b80f8c926836e896bcbb3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f0ff7f12398e85b3a11745ff7feab6246f3d75c2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00444
epssPercentile: 0.38063
ingestedAt: '2026-07-11T17:13:40.357Z'
---

## Overview

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.

## Affected

- `linux_kernel >= 6.6.32, < 6.7`
- `linux_kernel >= 6.9, < 6.18.33`
- `linux_kernel >= 6.19, < 7.0.10`

## Remediation

Upgrade past the affected range:

- `linux_kernel 7.0.10`