CVE-2023-53459

Freed kernel memory access via uncanceled delayed work

Published Oct 1, 2025 · Updated Oct 1, 2025

Use-after-free in Linux kernel 6.2 allows local users to make delayed work access freed memory during MCP2221 device removal. drivers/hid/hid-mcp2221.c lets mcp_init_work requeue after device-managed cleanup frees its mcp_2221 structure because removal does not synchronously cancel the delayed work. Reaching the race requires an MCP2221 device and carefully timed attachment or removal; the kernel record does not specify whether the outcome is a crash, disclosure, or code execution.

CVSS severity7.8
High
EPSS probability0.15%
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

Use-after-free in Linux kernel 6.2 allows local users to make delayed work access freed memory during MCP2221 device removal. drivers/hid/hid-mcp2221.c lets mcp_init_work requeue after device-managed cleanup frees its mcp_2221 structure because removal does not synchronously cancel the delayed work. Reaching the race requires an MCP2221 device and carefully timed attachment or removal; the kernel record does not specify whether the outcome is a crash, disclosure, or code execution.

The record

CVE
CVE-2023-53459
Published
Oct 1, 2025
Updated
Oct 1, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 2025Record 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=6.2
  2. Affected versionversion=960f9df7c620ecb6030aff1d9a6c3d67598b8290 <47e91fdfa511139f2549687edb0d8649b123227b
  3. Affected versionversion=960f9df7c620ecb6030aff1d9a6c3d67598b8290 <5dc297652dbc557eba7ca7d6a4c5f1940dffffb1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.2; version=960f9df7c620ecb6030aff1d9a6c3d67598b8290 <47e91fdfa511139f2549687edb0d8649b123227b; version=960f9df7c620ecb6030aff1d9a6c3d67598b8290 <5dc297652dbc557eba7ca7d6a4c5f1940dffffb1

Published CVSS scores

7.8NVDCVSS: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-416Use After Free

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