CVE-2026-43215

high

Description

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.

References

https://git.kernel.org/stable/c/96c4af418586ee9a6aab61738644366426e05316

https://git.kernel.org/stable/c/953953abb66e52c224057ab91e404284fefeab62

https://git.kernel.org/stable/c/8c59eeeeffa1524ef57e173a89a1a3ff539888d5

https://git.kernel.org/stable/c/601dd3b79769b38d30b693c40afdb2a4b7edf9d0

https://git.kernel.org/stable/c/3969db6b22e3d90d8c5f22ac1a7fe0350a94c136

Details

Source: Mitre, NVD

Published: 2026-05-06

Updated: 2026-05-08

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 8.8

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

Severity: High

EPSS

EPSS: 0.00018