CVE-2026-43215

Summary

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix locking usage for tcon fields We used to use the cifs_tcp_ses_lock to protect a lot of objects that are not just the server, ses or tcon lists. We later introduced srv_lock, ses_lock and tc_lock to protect fields within the corresponding structs. This was done to provide a more granular protection and avoid unnecessary serialization. There were still a couple of uses of cifs_tcp_ses_lock to provide tcon fields. In this patch, I've replaced them with tc_lock.

Impact & exploitability

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products we track (1)

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/3969db6b22e3d90d8c5f22ac1a7fe0350a94c136 ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/3969db6b22e3d90d8c5f22ac1a7fe0350a94c136Patch
• https://git.kernel.org/stable/c/601dd3b79769b38d30b693c40afdb2a4b7edf9d0Patch
• https://git.kernel.org/stable/c/8c59eeeeffa1524ef57e173a89a1a3ff539888d5Patch
• https://git.kernel.org/stable/c/953953abb66e52c224057ab91e404284fefeab62Patch
• https://git.kernel.org/stable/c/96c4af418586ee9a6aab61738644366426e05316Patch
• https://git.kernel.org/stable/c/92d197ef7e9bb4994dae2bb17c2f19fa09d219a2