Monitor vulnerabilities like this one.
Sign up free to get alerted when software you use is affected.
7.8
Linux Kernel ksmbd Vulnerability Allows Data Corruption in Multi-Channel Sessions
CVE-2026-23226
Summary
A bug in the Linux kernel's ksmbd component can cause data corruption in multi-channel sessions. This happens when the program tries to access data that has already been deleted. To fix this, the developers added a lock to protect the affected data, which should prevent this issue from happening in the future. You should update to the latest version of the Linux kernel to ensure you have this fix.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| linux | linux_kernel | > 6.3 , <= 6.18.11 | – |
| linux | linux_kernel | > 6.19 , <= 6.19.1 | – |
Original title
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...
Original description
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.
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.
nvd CVSS3.1
7.8
Vulnerability type
CWE-416
Use After Free
- https://git.kernel.org/stable/c/36ef605c0395b94b826a8c8d6f2697071173de6e Patch
- https://git.kernel.org/stable/c/4f3a06cc57976cafa8c6f716646be6c79a99e485 Patch
- https://git.kernel.org/stable/c/e4a8a96a93d08570e0405cfd989a8a07e5b6ff33 Patch
- https://git.kernel.org/stable/c/4c2ca31608521895dd742a43beca4b4d29762345
Published: 18 Feb 2026 · Updated: 13 Mar 2026 · First seen: 6 Mar 2026