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7.8
HIGH CVSS 3.1
CVE-2026-23226
ksmbd: add chann_lock to protect ksmbd_chann_list xarray
Overview
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.

Details
INFO

Published Date :

Feb. 18, 2026, 4:22 p.m.

Last Modified :

March 13, 2026, 7:54 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-23226 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH [email protected]
Solution
Race condition vulnerability fixed by adding a lock to protect shared data structures.
  • Update the Linux kernel to the resolved version.
  • Apply the patch that introduces the chann_lock.
  • Ensure proper synchronization for shared data access.
  • Review multi-channel session handling.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-23226.

URL Resource
https://git.kernel.org/stable/c/36ef605c0395b94b826a8c8d6f2697071173de6e Patch
https://git.kernel.org/stable/c/4c2ca31608521895dd742a43beca4b4d29762345
https://git.kernel.org/stable/c/4f3a06cc57976cafa8c6f716646be6c79a99e485 Patch
https://git.kernel.org/stable/c/e4a8a96a93d08570e0405cfd989a8a07e5b6ff33 Patch
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-23226 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-23226 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-23226 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-23226 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Mar. 13, 2026

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/stable/c/4c2ca31608521895dd742a43beca4b4d29762345
  • Initial Analysis by [email protected]

    Mar. 02, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Added CWE CWE-416
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.3 up to (excluding) 6.18.11 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 6.19.1
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/36ef605c0395b94b826a8c8d6f2697071173de6e Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/4f3a06cc57976cafa8c6f716646be6c79a99e485 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/e4a8a96a93d08570e0405cfd989a8a07e5b6ff33 Types: Patch
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Feb. 23, 2026

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/stable/c/4f3a06cc57976cafa8c6f716646be6c79a99e485
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Feb. 18, 2026

    Action Type Old Value New Value
    Added 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.
    Added Reference https://git.kernel.org/stable/c/36ef605c0395b94b826a8c8d6f2697071173de6e
    Added Reference https://git.kernel.org/stable/c/e4a8a96a93d08570e0405cfd989a8a07e5b6ff33
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact