PT-2026-20452 · Linux · Linux Kernel

CVE-2026-23226 · Published 2026-01-01 · Updated 2026-07-28

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The Linux kernel’s ksmbd module contains a synchronization issue within the ksmbd chann list xarray. This lack of synchronization can lead to a use-after-free condition in multi-channel sessions, specifically between the lookup chann list() and ksmbd chann del functions. A rw semaphore named chann lock has been added to the ksmbd session structure to protect all accesses related to the xarray.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-23226

ECHO-F7A0-3515-5769

OESA-2026-1642

OESA-2026-1643

OESA-2026-1644

OPENSUSE-SU-2026:10387-1

USN-8567-1

USN-8574-1

USN-8574-2

USN-8574-3

USN-8595-1

USN-8595-2

USN-8595-3

USN-8596-1

USN-8606-1

USN-8607-1

USN-8608-1

USN-8609-1

USN-8619-1

Affected Products

Linux Kernel

References · 1318

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23226.json · Exploit
• https://ubuntu.com/security/CVE-2026-31730 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43445 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31720 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-45938 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-63860 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-45991 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68736 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43227 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23343 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23128 · Security Note
• https://ubuntu.com/security/CVE-2026-45999 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-53304 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-8574-3 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31725 · Vendor Advisory