CVE-2023-52629

Kernel memory corruption via push-switch teardown race

Published Mar 29, 2024 · Updated May 11, 2026

Use-after-free in the Linux kernel's SuperH push-switch driver allows local users to corrupt kernel memory during device removal. switch_drv_remove() flushes work before stopping the timer, allowing switch_timer() to reschedule switch_work_handler() after the driver state is freed. Exposure requires the SuperH push-switch driver and a teardown race; the documented stale write corrupts freed kernel memory.

CVSS severity8.4
High
EPSS probability0.24%
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 the Linux kernel's SuperH push-switch driver allows local users to corrupt kernel memory during device removal. switch_drv_remove() flushes work before stopping the timer, allowing switch_timer() to reschedule switch_work_handler() after the driver state is freed. Exposure requires the SuperH push-switch driver and a teardown race; the documented stale write corrupts freed kernel memory.

The record

CVE
CVE-2023-52629
Published
Mar 29, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 29, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=2.6.20
  2. Affected versionversion=9f5e8eee5cfe1328660c71812d87c2a67bda389f <246f80a0b17f8f582b2c0996db02998239057c65
  3. Affected versionversion=9f5e8eee5cfe1328660c71812d87c2a67bda389f <610dbd8ac271aa36080aac50b928d700ee3fe4de

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.20; version=9f5e8eee5cfe1328660c71812d87c2a67bda389f <246f80a0b17f8f582b2c0996db02998239057c65; version=9f5e8eee5cfe1328660c71812d87c2a67bda389f <610dbd8ac271aa36080aac50b928d700ee3fe4de
The Linux Kernel Organization · Linux Kernelversion=2.6.20; version=9f5e8eee5cfe <246f80a0b17f; version=9f5e8eee5cfe <610dbd8ac271

Published CVSS scores

8.4CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/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
Privilegesunauthenticated
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