CVE-2026-23226
HIGH severity · CVSS 8.8 · Use-after-free
8.8CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/36ef605c0395b94b826a8c8d6f2697071173de6e ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/36ef605c0395b94b826a8c8d6f2697071173de6ePatch
- https://git.kernel.org/stable/c/4f3a06cc57976cafa8c6f716646be6c79a99e485Patch
- https://git.kernel.org/stable/c/e4a8a96a93d08570e0405cfd989a8a07e5b6ff33Patch
- https://git.kernel.org/stable/c/43ad494ac6e940a8eabf25d5bd77bb3bb53b1153
- https://git.kernel.org/stable/c/4c2ca31608521895dd742a43beca4b4d29762345
- https://git.kernel.org/stable/c/c00f3938f7ac52770907768e440cf253af9cbb63