CVE-2026-64387

critical

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix query directory replay double-free A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_query_directory_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/9647492b5e41954be59d5157eddbcd4cdc1656f7

https://git.kernel.org/stable/c/3409aedf3c81a810243da94164f6621c9d205c98

https://git.kernel.org/stable/c/3317a5d015fca976475aa71df224056777316fde

https://git.kernel.org/stable/c/1665f25b1dea30bf2d02e16245d203a944c9d994

https://git.kernel.org/stable/c/00b0fa425941438b664950a8ee65dfba2def4336

Details

Source: Mitre, NVD

Published: 2026-07-25

Updated: 2026-08-11

Risk Information

CVSS v2

Base Score: 10

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

Severity: Critical

CVSS v3

Base Score: 9.8

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

Severity: Critical

EPSS

EPSS: 0.00209