CVE-2026-23226

ksmbd: add chann_lock to protect ksmbd_chann_list xarray

CVSS 8.8 HIGHEPSS 0.4%

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.8EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

18 Feb 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

In the Linux kernel, the following vulnerability has been resolved: ksmbd: add chann_lock to protect ksmbd_chann_list xarray ksmbd_chann_list xarray lacks synchronization, allowing use-after-free in multi-channel sessions (between lookup_chann_list() and ksmbd_chann_del). Adds rw_semaphore chann_lock to struct ksmbd_session and protects all xa_load/xa_store/xa_erase accesses.

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

Affected products

Linux · Linux

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References

https://git.kernel.org/stable/c/36ef605c0395b94b826a8c8d6f2697071173de6e https://git.kernel.org/stable/c/4c2ca31608521895dd742a43beca4b4d29762345 https://git.kernel.org/stable/c/4f3a06cc57976cafa8c6f716646be6c79a99e485 https://git.kernel.org/stable/c/e4a8a96a93d08570e0405cfd989a8a07e5b6ff33