CVEvulnerability

CVE-2026-64136

9.8 CRITICAL Published 2026-07-19 Modified 2026-10-19 Official page ↗
Status
Modified
Published
2026-07-19
Last modified
2026-10-19
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-362

Description

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().

Affected configurations

• linux linux kernel (>= 6.6.128 < 6.6.142) • linux linux kernel (>= 6.12.75 < 6.12.92) • linux linux kernel (>= 6.18.16 < 6.18.34) • linux linux kernel (>= 6.19.6 < 7.0.11) • linux linux kernel 7.1

Related

Weakness · CWE (1)

  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization weakness

References