Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2026-23226

Severity CVSS v4.0:
Pending analysis
Type:
CWE-416 Use After Free
Publication date:
18/02/2026
Last modified:
02/04/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ksmbd: add chann_lock to protect ksmbd_chann_list xarray<br /> <br /> ksmbd_chann_list xarray lacks synchronization, allowing use-after-free in<br /> multi-channel sessions (between lookup_chann_list() and ksmbd_chann_del).<br /> <br /> Adds rw_semaphore chann_lock to struct ksmbd_session and protects<br /> all xa_load/xa_store/xa_erase accesses.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.80 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
8.80
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.3 (including) 6.18.11 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.19 (including) 6.19.1 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools