CVE-2026-64136 — smb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked()
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: F…
Published: 2026-07-19 · CVSS: 9.8 · CVSS 3.1
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().
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7