PT-2026-30169 · Linux · Linux Kernel

Published 2026-04-03 · Updated 2026-05-03 · CVE-2026-23475

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 (affected versions not specified)

Description The Linux kernel contained a flaw where controller per-cpu statistics were not allocated until after the controller was registered, creating a window where accessing sysfs attributes could lead to a NULL-pointer dereference. The fix involves moving the statistics allocation to controller allocation and tying its lifetime to the controller.

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

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2026-23475

ECHO-76F1-58CF-3AE1

OESA-2026-2172

OESA-2026-2176

Affected Products

Linux Kernel

References · 43

• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2404-CVE-2026-23475 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-71089 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2026-23475 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23442 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23455 · Security Note
• https://git.kernel.org/stable/c/dee0774bbb2abb172e9069ce5ffef579b12b3ae9 · Patch
• https://osv.dev/vulnerability/OESA-2026-2172 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-23475 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-27558 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23452 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31416 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23447 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23449 · Security Note
• https://git.kernel.org/stable/c/f13100b1f5f111989f0750540a795fdef47492af · Patch
• https://git.kernel.org/stable/c/80c5bd0dca1cc5526ae0f4b273ccd163ed4caa4e · Patch