CVE-2026-64385

high

Description

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.

References

https://git.kernel.org/stable/c/fc65ffb4ef1bf540da16b17c225ae51091e07d72

https://git.kernel.org/stable/c/f9bbadb6c94583e3b4af1afc449bfceb1d1ddec9

https://git.kernel.org/stable/c/96fcfc8ae7359346156e492ca610e830d2649ad6

https://git.kernel.org/stable/c/276c8efbc49f9303ac76d0d4deab7128581b0f3b

https://git.kernel.org/stable/c/0be4bc64882edaefaaee8d1e27d083643eb778e6

Details

Source: Mitre, NVD

Published: 2026-07-25

Updated: 2026-07-25

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 7.1

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Severity: High

EPSS

EPSS: 0.00209