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 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 v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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/92d197ef7e9bb4994dae2bb17c2f19fa09d219a2
https://git.kernel.org/stable/c/953953abb66e52c224057ab91e404284fefeab62	Patch
https://git.kernel.org/stable/c/96c4af418586ee9a6aab61738644366426e05316	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

30 Oct 2026, 13:18

Type	Values Removed	Values Added
References		() https://git.kernel.org/stable/c/92d197ef7e9bb4994dae2bb17c2f19fa09d219a2 -

19 Oct 2026, 20:18

Type	Values Removed	Values Added
CWE		CWE-362

Information

Published : 2026-05-06 12:16

Updated : 2026-10-30 13:18

NVD link : CVE-2026-43215

Mitre link : CVE-2026-43215

CVE.ORG link : CVE-2026-43215

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-667

Improper Locking

CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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We later introduced\nsrv_lock, ses_lock and tc_lock to protect fields within the\ncorresponding structs. This was done to provide a more granular\nprotection and avoid unnecessary serialization.\n\nThere were still a couple of uses of cifs_tcp_ses_lock to provide\ntcon fields. 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