CVE-2026-43150

Description

In the Linux kernel, the following vulnerability has been resolved: perf/arm-cmn: Reject unsupported hardware configurations So far we've been fairly lax about accepting both unknown CMN models (at least with a warning), and unknown revisions of those which we do know, as although things do frequently change between releases, typically enough remains the same to be somewhat useful for at least some basic bringup checks. However, we also make assumptions of the maximum supported sizes and numbers of things in various places, and there's no guarantee that something new might not be bigger and lead to nasty array overflows. Make sure we only try to run on things that actually match our assumptions and so will not risk memory corruption. We have at least always failed on completely unknown node types, so update that error message for clarity and consistency too.

CVSS Details

CVSS Score

7.8

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Configurations (Affected Products)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* - VULNERABLE

Linux Kernel < v6.1 (Specific commit fix)

Linux Kernel < v6.6 (Specific commit fix)

Linux Kernel < v6.8 (Specific commit fix)

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

/*
 * Conceptual PoC for CVE-2026-43150
 * Triggering the vulnerability requires a system with an ARM CMN
 * hardware configuration that is 'unknown' to the driver
 * and has dimensions larger than the driver's hardcoded limits.
 *
 * This is typically triggered automatically on boot or module load.
 */

#include <linux/module.h>
#include <linux/kernel.h>

int init_module(void) {
    printk(KERN_INFO "PoC: Loading module to trigger arm-cmn probe on large/unknown hardware\n");
    
    // The vulnerability occurs when the arm-cmn driver probes the device.
    // If the hardware revision ID is unknown (e.g., newer silicon)
    // and the mesh size (e.g., 6x6) exceeds the assumed max (e.g., 4x4),
    // the driver writes past the end of the allocated node array.
    
    return 0;
}

void cleanup_module(void) {
    printk(KERN_INFO "PoC: Unloading module\n");
}

MODULE_LICENSE("GPL");

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-43150
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-43150
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-43150/
[4] VulDB https://vuldb.com/cve/CVE-2026-43150
[5] https://git.kernel.org/stable/c/00d69f21ef2ab00e6156c764d89e2b3539eb2f33
[6] https://git.kernel.org/stable/c/08c7eadd8a934a1968e1aeeee8b61b853b99fb3a
[7] https://git.kernel.org/stable/c/36c0de02575ce59dfd879eb4ef63d53a68bbf9ce
[8] https://git.kernel.org/stable/c/7e2c200010aa93fa78201da959b4ac6b9f8fed0b
[9] https://git.kernel.org/stable/c/a251d866f50b6a4c95901fa722025065679c2eca
[10] https://git.kernel.org/stable/c/d3e837e11ee9ed08df229272319199003ba00379

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-43150", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-06T12:16:32.690", "lastModified": "2026-05-13T20:14:44.200", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf/arm-cmn: Reject unsupported hardware configurations\n\nSo far we've been fairly lax about accepting both unknown CMN models\n(at least with a warning), and unknown revisions of those which we\ndo know, as although things do frequently change between releases,\ntypically enough remains the same to be somewhat useful for at least\nsome basic bringup checks. However, we also make assumptions of the\nmaximum supported sizes and numbers of things in various places, and\nthere's no guarantee that something new might not be bigger and lead\nto nasty array overflows. Make sure we only try to run on things that\nactually match our assumptions and so will not risk memory corruption.\n\nWe have at least always failed on completely unknown node types, so\nupdate that error message for clarity and consistency too."}], "metrics": {"cvssMetricV31": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-787"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.63", "versionEndExcluding": "6.1.165", "matchCriteriaId": "AD1E11C2-5A82-49FA-B142-61E121FD4529"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.6.128", "matchCriteriaId": "A502C6C1-0CFB-4C9B-8A24-C76507206FA7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.12.75", "matchCriteriaId": "BCE16369-98ED-41CF-8995-DFDC10B288D2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.16", "matchCriteriaId": "B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "6.19.6", "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/00d69f21ef2ab00e6156c764d89e2b3539eb2f33", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/08c7eadd8a934a1968e1aeeee8b61b853b99fb3a", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/36c0de02575ce59dfd879eb4ef63d53a68bbf9ce", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/7e2c200010aa93fa78201da959b4ac6b9f8fed0b", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/a251d866f50b6a4c95901fa722025065679c2eca", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/d3e837e11ee9ed08df229272319199003ba00379", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}