CVE-2026-64136

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-64136

Key Details

CVE	CVE-2026-64136
CVSS Score / Version	9.8 (Critical) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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

smb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked()

Commit 96c4af418586 ("cifs: Fix locking usage for tcon fields")

refactored cifs code to change cifs_tcp_ses_lock for tc_lock around

tc_count changes.

There was missing lock around tc_count increment inside

smb2_find_smb_sess_tcon_unlocked(). (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-64136
CVE	https://www.cve.org/CVERecord?id=CVE-2026-64136

Source

Reference

NVD

CVE