CVE-2024-42123

System crash via repeated AMDGPU error-address free

Published Jul 30, 2024 · Updated Aug 5, 2026

A double free in Linux 4.2 through 6.9.8 allows local users with high privileges to crash the system through AMDGPU UMC error handling. amdgpu_umc_bad_page_polling_timeout repeatedly invokes amdgpu_umc_handle_bad_pages without clearing err_addr after it is freed, so a later pass frees the stale pointer again. The path requires an AMD GPU using UMC bad-page polling and high local privileges; the documented consequence is a system crash.

CVSS severity4.4
Medium
EPSS probability0.21%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A double free in Linux 4.2 through 6.9.8 allows local users with high privileges to crash the system through AMDGPU UMC error handling. amdgpu_umc_bad_page_polling_timeout repeatedly invokes amdgpu_umc_handle_bad_pages without clearing err_addr after it is freed, so a later pass frees the stale pointer again. The path requires an AMD GPU using UMC bad-page polling and high local privileges; the documented consequence is a system crash.

The record

CVE
CVE-2024-42123
Published
Jul 30, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-415, T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jul 30, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=4.2
  2. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <506c245f3f1cd989cb89811a7f06e04ff8813a0d
  3. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <8e24beb3c2b08a4763f920399a9cc577ed440a1a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=4.2; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <506c245f3f1cd989cb89811a7f06e04ff8813a0d; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <8e24beb3c2b08a4763f920399a9cc577ed440a1a

Published CVSS scores

4.4NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-415Double Free
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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