PT-2026-27734 · Linux · Linux Kernel

Published 2026-01-01 · Updated 2026-04-20 · CVE-2026-23369

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 5.14.0-611.5.1.el9 7

Description The Linux kernel contained an issue where multiple udev threads could collect i801 device information concurrently during boot. This could lead to a kernel panic because the i801 acpi io handler function was accessed after the associated memory area was deregistered. Specifically, the issue stemmed from reverting a previous commit that replaced acpi lock with an I2C bus lock. The root cause was a race condition where the memory area could be unregistered before a check confirmed its registration status, resulting in a NULL pointer dereference when i2c lock bus attempted to access the unregistered area.

Recommendations Update the Linux kernel to version 5.14.0-611.5.1 or later.

Exploit

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2026-23369

OPENSUSE-SU-2026:20826-1

SUSE-SU-2026:21841-1

SUSE-SU-2026:21845-1

SUSE-SU-2026:21860-1

Affected Products

Linux Kernel

References · 18

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23369.json · Exploit
• https://ubuntu.com/security/CVE-2026-23369 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-23369 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-23369 · Vendor Advisory
• https://git.kernel.org/stable/c/1c72e7b0b442ce21a1348d9b8237cfddb67048eb · Patch
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2404-CVE-2026-23369 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-23369 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-23369 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-23369 · Vendor Advisory
• https://git.kernel.org/stable/c/c726273044a5a8308a889d19d6884135c0f3321d · Patch
• https://git.kernel.org/stable/c/9507f9953a2a5647eb42668d0c243fdbd7e72954 · Patch
• https://cve.org/CVERecord?id=CVE-2026-23369 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23369 · Security Note
• https://git.kernel.org/stable/c/cfc69c2e6c699c96949f7b0455195b0bfb7dc715 · Patch
• https://git.kernel.org/linus/cfc69c2e6c699c96949f7b0455195b0bfb7dc715 · Note