CVE-2026-23226

EUVD-2026-7675
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8.8 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 6%
Affected Products (NVD)
VendorProductVersion
linuxlinux_kernel
6.3 ≤
𝑥
< 6.18.11
linuxlinux_kernel
6.19 ≤
𝑥
< 6.19.1
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
linux
bookworm
vulnerable
bookworm (security)
vulnerable
bullseye
5.10.223-1
fixed
bullseye (security)
5.10.251-5
fixed
forky
7.0.7-1
fixed
sid
7.0.7-1
fixed
trixie
6.12.86-1
fixed
trixie (security)
6.12.88-1
fixed
Common Weakness Enumeration
References
https://git.kernel.org/stable/c/36ef605c0395b94b826a8c8d6f2697071173de6e
https://git.kernel.org/stable/c/4c2ca31608521895dd742a43beca4b4d29762345
https://git.kernel.org/stable/c/4f3a06cc57976cafa8c6f716646be6c79a99e485
https://git.kernel.org/stable/c/e4a8a96a93d08570e0405cfd989a8a07e5b6ff33