CVE-2026-31608 CRITICAL

CVE-2026-31608: smb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list()

Vendor Linux
Product Linux
Published April 24, 2026
Last update June 14, 2026
View on NVD All CVEs

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

In the Linux kernel, the following vulnerability has been resolved: smb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list() smb_direct_flush_send_list() already calls smb_direct_free_sendmsg(), so we should not call it again after post_sendmsg() moved it to the batch list.

Key dates

02Disclosure timeline

April 24, 2026 CVE published
June 14, 2026 Record updated