CVE-2026-64385CWE-415

CVE-2026-64385

Critical · published July 25, 2026

CVSS v3.1
9.8
EPSS
0%
Percentile
38.7
In the wild
Unconfirmed
What it is

In the Linux kernel, the following vulnerability has been resolved:

smb: client: fix double-free in SMB2_ioctl() replay

A response-bearing attempt can return a replayable error and free its

response buffer. If SMB2_ioctl_init() fails before the next send, cleanup

retains the previous buffer type and frees that response again.

Reset response bookkeeping before each attempt to prevent the stale free.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00457 · 38.7th percentile
Weakness
CWE-415 · Double Free
Published
2026-07-25T14:17Z
Affected products (11)
ProductVersionsFixed in
linux/linux_kernel≥ 6.6.32, < 6.6.1456.6.145
linux/linux_kernel≥ 6.8.1, < 6.12.966.12.96
linux/linux_kernel≥ 6.13, < 6.18.396.18.39
linux/linux_kernel≥ 6.19, < 7.1.47.1.4
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
References (5)
https://git.kernel.org/stable/c/0be4bc64882edaefaaee8d1e27d083643eb778e6 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/276c8efbc49f9303ac76d0d4deab7128581b0f3b · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/96fcfc8ae7359346156e492ca610e830d2649ad6 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f9bbadb6c94583e3b4af1afc449bfceb1d1ddec9 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fc65ffb4ef1bf540da16b17c225ae51091e07d72 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS history
Timeline
  • 25 JUL 08:50Z
    smb: client: fix double-free in SMB2_ioctl() replay
    cvelistv5