CVE-2026-64136

CVE-2026-64136 fixes a race condition in the Linux kernel SMB client (CIFS) by adding the missing lock around tc_count in smb2_find_smb_sess_tcon_unlocked(). The root cause was refactoring that altered locking for tc_lock/tcon fields, leaving tc_count increment without synchronization. The patch ...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerabilities have been resolved: cifs: Fixed the locking usage for tcon fields. Previously, we used cifstcpseslock to protect many objects that weren’t just server, ses, or tcon lists. Later, we introduced svrlock, seslock, and tc Lock to protect fields withi...

SUSE CVE-2026-43215

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix locking usage for tcon fields We used to use the cifstcpseslock to protect a lot of objects that are not just the server, ses or tcon lists. We later introduced srvlock, seslock and tclock to protect fields within the...

CVE-2026-43215

A flaw was found in the Linux kernel's Common Internet File System CIFS implementation. Incorrect locking mechanisms were used for tcon fields, where the cifstcpseslock was applied too broadly instead of more granular locks. This improper locking could lead to concurrency issues within the kernel...

CVE-2026-43215

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix locking usage for tcon fields We used to use the cifstcpseslock to protect a lot of objects that are not just the server, ses or tcon lists. We later introduced srvlock, seslock and tclock to protect fields within the...

CVE-2026-43215

The CVE-2026-43215 issue affects the Linux kernel CIFS implementation: the code used cifs_tcp_ses_lock to guard tcon fields, but this lock protected more than intended. The patch introduces more granular locking (tc_lock) within tcon-related structures (in addition to srv_lock and ses_lock) to re...

CVE-2026-43215 cifs: Fix locking usage for tcon fields

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix locking usage for tcon fields We used to use the cifstcpseslock to protect a lot of objects that are not just the server, ses or tcon lists. We later introduced srvlock, seslock and tclock to protect fields within the...

CVE-2026-43215 cifs: Fix locking usage for tcon fields

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix locking usage for tcon fields We used to use the cifstcpseslock to protect a lot of objects that are not just the server, ses or tcon lists. We later introduced srvlock, seslock and tclock to protect fields within the...

CVE-2026-43215

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix locking usage for tcon fields We used to use the cifstcpseslock to protect a lot of objects that are not just the server, ses or tcon lists. We later introduced srvlock, seslock and tclock to protect fields within the...

CVE-2026-43215

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix locking usage for tcon fields We used to use the cifstcpseslock to protect a lot of objects that are not just the server, ses or tcon lists. We later introduced srvlock, seslock and tclock to protect fields within the...

CVE-2026-43215: Improper Locking

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix locking usage for tcon fields We used to use the cifstcpseslock to protect a lot of objects that are not just the server, ses or tcon lists. We later introduced srvlock, seslock and tclock to protect fields within the...

PT-2026-37555

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the CIFS component where cifs tcp ses lock was used to protect various objects, including tcon fields, instead of using more granular locks. This caused unnecessary...

Linux Distros Unpatched Vulnerability : CVE-2026-43215

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - cifs: Fix locking usage for tcon fields We used to use the cifstcpseslock to protect a lot of objects that are not just the server, ses or tcon lists. We later...