CVE-2026-64597

CRITICAL

smb: client: fix double-free in SMB2_close() replay

Title source: cna
STIX 2.1

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_close() replay A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_close_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 (5)

Core 5

Scores

CVSS v3 9.8
EPSS 0.0036
EPSS Percentile 29.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

Status published
Products (17)
linux/Kernel < 6.6.145linux
linux/Kernel 6.13.0 - 7.1.4linux
linux/Kernel 6.7.0 - 6.12.96linux
linux/Kernel 6.8.0 - 6.18.39linux
Linux/Linux < 6.8
Linux/Linux 433042a91f9373241307725b52de573933ffedbf - 037511726228aaf165c7067ff2bfc88eaecdf1f3
Linux/Linux 4f1fffa2376922f3d1d506e49c0fd445b023a28e - 0aa97edf7c347c0f54e7e60c4740574b8120c66a
Linux/Linux 4f1fffa2376922f3d1d506e49c0fd445b023a28e - b18ed621dbfceecea5539848cddcb9272c9a61e1
Linux/Linux 4f1fffa2376922f3d1d506e49c0fd445b023a28e - d15d83125007f673aec4323e1bbbaaffbe87ea13
Linux/Linux 4f1fffa2376922f3d1d506e49c0fd445b023a28e - f96e1cdcb63ed3321142ff2fcdf784e32cda8fee
... and 7 more
Published Aug 06, 2026
Tracked Since Aug 06, 2026