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Vulnerability record · CVE-2026-43215 · published 6 May 2026

CVE-2026-43215: Linux kernel vulnerability

Linux · Linux Kernel

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.

8.8 CVSS 3.1 High EPSS 0.41% · top 67.5% CWE-667 · CWE-667
8.8CVSS 3.1 base score
0.41%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/3969db6b22e3d90d8c5f22ac1a7fe0350a94c136 Patch
https://git.kernel.org/stable/c/601dd3b79769b38d30b693c40afdb2a4b7edf9d0 Patch
https://git.kernel.org/stable/c/8c59eeeeffa1524ef57e173a89a1a3ff539888d5 Patch
https://git.kernel.org/stable/c/953953abb66e52c224057ab91e404284fefeab62 Patch
https://git.kernel.org/stable/c/96c4af418586ee9a6aab61738644366426e05316 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-43215), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.