High 8.8Published May 6, 2026

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

Updated under an hour ago (Oct 28, 2026, 5:00 AM ET)

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Exploited in the last 30 days

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: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-362
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8 before 953953abb66e52c224057ab91e404284fefeab62; from d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8 before 601dd3b79769b38d30b693c40afdb2a4b7edf9d0; from d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8 before 3969db6b22e3d90d8c5f22ac1a7fe0350a94c136; from d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8 before 8c59eeeeffa1524ef57e173a89a1a3ff539888d5; from d7d7a66aacd6fd8ca57baf08a7bac5421282f6f8 before 96c4af418586ee9a6aab61738644366426e05316	CNA record
linux linux_kernel linux:linux_kernel	from 6.0 before 6.6.128; from 6.7 before 6.12.75; from 6.13 before 6.18.16; from 6.19 before 6.19.6	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.