PT-2026-20452 · Linux · Linux Kernel

Published 2026-01-01 · Updated 2026-05-26 · CVE-2026-23226

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

Affected Products

Linux Kernel

References · 77

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23226.json · Exploit
• https://cve.org/CVERecord?id=CVE-2026-23226 · Security Note
• https://git.kernel.org/stable/c/e4a8a96a93d08570e0405cfd989a8a07e5b6ff33 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-23226 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-71204 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23113 · Security Note
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-12-CVE-2026-23226 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23128 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-14027 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23119 · Security Note
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2404-CVE-2026-23226 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23177 · Security Note
• https://ubuntu.com/security/CVE-2026-23226 · Vendor Advisory
• https://git.kernel.org/stable/c/4f3a06cc57976cafa8c6f716646be6c79a99e485 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-23226 · Vendor Advisory