CVE-2026-23226

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

7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.5% chance of exploitation in the next 30 days; higher than 41% of CVEs (scores of 2026-10-25)

CWE

CWE-416

Published

2026-02-18

Modified

2026-10-21

Record from

the NVD, synced 2026-10-22

Affected

• linux:linux_kernel

References

• https://git.kernel.org/stable/c/36ef605c0395b94b826a8c8d6f2697071173de6e
• https://git.kernel.org/stable/c/43ad494ac6e940a8eabf25d5bd77bb3bb53b1153
• https://git.kernel.org/stable/c/4c2ca31608521895dd742a43beca4b4d29762345
• https://git.kernel.org/stable/c/4f3a06cc57976cafa8c6f716646be6c79a99e485
• https://git.kernel.org/stable/c/e4a8a96a93d08570e0405cfd989a8a07e5b6ff33

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