High 8.8Published Feb 18, 2026

CVE-2026-23226ksmbd: add chann_lock to protect ksmbd_chann_list xarray

Updated under an hour ago (Oct 27, 2026, 6:50 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 1d9c4172110e645b383ff13eee759728d74f1a5d before 43ad494ac6e940a8eabf25d5bd77bb3bb53b1153; from 1d9c4172110e645b383ff13eee759728d74f1a5d before 4c2ca31608521895dd742a43beca4b4d29762345; from 1d9c4172110e645b383ff13eee759728d74f1a5d before e4a8a96a93d08570e0405cfd989a8a07e5b6ff33; from 1d9c4172110e645b383ff13eee759728d74f1a5d before 36ef605c0395b94b826a8c8d6f2697071173de6e; from 1d9c4172110e645b383ff13eee759728d74f1a5d before 4f3a06cc57976cafa8c6f716646be6c79a99e485; b1caecbf34b8c8260d851ec4efde71f3694460b7; 91bbf9cb2387a0d76322e9a343bc6bc160f66b3f; 853c416710b075153c1e1421e099ffbe5dac68ce; and 3 more ranges	CNA record
linux linux_kernel linux:linux_kernel	from 6.3 before 6.18.11; from 6.19 before 6.19.1	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.