CVE-2026-43150

Kernel memory corruption via unchecked CMN topology

Published May 6, 2026 · Updated May 6, 2026

Memory corruption in the Linux kernel's perf/arm-cmn driver allows attackers to corrupt kernel memory during unsupported CMN discovery. arm_cmn_discover accepts logical node IDs and mesh dimensions beyond its compiled maxima, allowing later fixed-size array operations to overflow. The condition requires unsupported ARM CMN hardware to report out-of-range topology values during probe; Ubuntu states that user space cannot invoke or influence it.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Memory corruption in the Linux kernel's perf/arm-cmn driver allows attackers to corrupt kernel memory during unsupported CMN discovery. arm_cmn_discover accepts logical node IDs and mesh dimensions beyond its compiled maxima, allowing later fixed-size array operations to overflow. The condition requires unsupported ARM CMN hardware to report out-of-range topology values during probe; Ubuntu states that user space cannot invoke or influence it.

The record

CVE
CVE-2026-43150
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-787
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=28fa550a49e818d6445e787f584759b1bf21d9d4 <7e2c200010aa93fa78201da959b4ac6b9f8fed0b
  2. Affected versionversion=6.5
  3. Affected versionversion=7819e05a0dceac20c5ff78ec9b252faf3b76b824 <00d69f21ef2ab00e6156c764d89e2b3539eb2f33
  4. Affected versionversion=7819e05a0dceac20c5ff78ec9b252faf3b76b824 <08c7eadd8a934a1968e1aeeee8b61b853b99fb3a
  5. Affected versionversion=7819e05a0dceac20c5ff78ec9b252faf3b76b824 <36c0de02575ce59dfd879eb4ef63d53a68bbf9ce
  6. Affected versionversion=7819e05a0dceac20c5ff78ec9b252faf3b76b824 <a251d866f50b6a4c95901fa722025065679c2eca
  7. Affected versionversion=7819e05a0dceac20c5ff78ec9b252faf3b76b824 <d3e837e11ee9ed08df229272319199003ba00379

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=28fa550a49e818d6445e787f584759b1bf21d9d4 <7e2c200010aa93fa78201da959b4ac6b9f8fed0b; version=6.5; version=7819e05a0dceac20c5ff78ec9b252faf3b76b824 <00d69f21ef2ab00e6156c764d89e2b3539eb2f33; version=7819e05a0dceac20c5ff78ec9b252faf3b76b824 <08c7eadd8a934a1968e1aeeee8b61b853b99fb3a; version=7819e05a0dceac20c5ff78ec9b252faf3b76b824 <36c0de02575ce59dfd879eb4ef63d53a68bbf9ce; version=7819e05a0dceac20c5ff78ec9b252faf3b76b824 <a251d866f50b6a4c95901fa722025065679c2eca; version=7819e05a0dceac20c5ff78ec9b252faf3b76b824 <d3e837e11ee9ed08df229272319199003ba00379

Published CVSS scores

7.8Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo