ksmbd: add chann_lock to protect ksmbd_chann_list xarray
CVE-2026-23226 · published 18 Feb 2026
How serious is it
- Severity: high, CVSS score 8.8 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-23226?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Linux Linux: 1d9c4172110e645b383ff13eee759728d74f1a5d to < 43ad494ac6e940a8eabf25d5bd77bb3bb53b1153, 1d9c4172110e645b383ff13eee759728d74f1a5d to < 4c2ca31608521895dd742a43beca4b4d29762345, 1d9c4172110e645b383ff13eee759728d74f1a5d to < e4a8a96a93d08570e0405cfd989a8a07e5b6ff33, 1d9c4172110e645b383ff13eee759728d74f1a5d to < 36ef605c0395b94b826a8c8d6f2697071173de6e
- Linux Linux: 6.3
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
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.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/43ad494ac6e940a8eabf25d5bd77bb3bb53b1153
- git.kernel.org/stable/c/4c2ca31608521895dd742a43beca4b4d29762345
- git.kernel.org/stable/c/e4a8a96a93d08570e0405cfd989a8a07e5b6ff33
- git.kernel.org/stable/c/36ef605c0395b94b826a8c8d6f2697071173de6e
- git.kernel.org/stable/c/4f3a06cc57976cafa8c6f716646be6c79a99e485
Merged from CVE List. Last updated 25 Oct 2026. All vulnerabilities · RSS · JSON