CVE-2026-23464

Service interruption via failed-probe memory leak

Published Apr 3, 2026 · Updated Apr 3, 2026

Memory leak in the Microchip PolarFire SoC system-controller driver in Linux Kernel allows local users to exhaust kernel memory. The mpfs_sys_controller_probe() error path returns when of_get_mtd_device_by_node() fails without freeing its allocated sys_controller object. The affected Microchip PolarFire SoC driver path must execute locally; accumulated leaked allocations can interrupt service through memory exhaustion.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in the Microchip PolarFire SoC system-controller driver in Linux Kernel allows local users to exhaust kernel memory. The mpfs_sys_controller_probe() error path returns when of_get_mtd_device_by_node() fails without freeing its allocated sys_controller object. The affected Microchip PolarFire SoC driver path must execute locally; accumulated leaked allocations can interrupt service through memory exhaustion.

The record

CVE
CVE-2026-23464
Published
Apr 3, 2026
Updated
Apr 3, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=6.8
  2. Affected versionversion=742aa6c563d29c367edbf0ef7236a7a853ed9be4 <17c84fb7cf3971cc621646185d785670e9530ca1
  3. Affected versionversion=742aa6c563d29c367edbf0ef7236a7a853ed9be4 <5a741f8cc6fe62542f955cd8d24933a1b6589cbd
  4. Affected versionversion=742aa6c563d29c367edbf0ef7236a7a853ed9be4 <da4b44c42f40501db35f5d0a6243708a061490a0
  5. Affected versionversion=742aa6c563d29c367edbf0ef7236a7a853ed9be4 <e3dd5cffba07de6574165a72851471cd42cc6d15

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.8; version=742aa6c563d29c367edbf0ef7236a7a853ed9be4 <17c84fb7cf3971cc621646185d785670e9530ca1; version=742aa6c563d29c367edbf0ef7236a7a853ed9be4 <5a741f8cc6fe62542f955cd8d24933a1b6589cbd; version=742aa6c563d29c367edbf0ef7236a7a853ed9be4 <da4b44c42f40501db35f5d0a6243708a061490a0; version=742aa6c563d29c367edbf0ef7236a7a853ed9be4 <e3dd5cffba07de6574165a72851471cd42cc6d15

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

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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-401Missing Release of Memory after Effective Lifetime
T1499Endpoint Denial of Service

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

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Your stack

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