This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-64136 →

DEBIAN-CVE-2026-64136

In the Linux kernel, the following vulnerability has been resolved: smb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked() Co...

Original description

The description as published by the source.

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: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:13 linux

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.94-1"}]}]

Debian:14 linux

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.12-1"}]}]

References

advisory security-tracker.debian.org