CVE-2024-53135

Host hang via unchecked guest Intel PT state

Published Dec 4, 2024 · Updated Aug 5, 2026

Improper validation in Linux KVM allows local users to hang hosts or crash guest VMs through Intel PT guest/host mode. The VMX code fails to keep tracing disabled before VM entry and trusts guest CPUID counts when selecting RTIT MSRs, causing invalid loads plus out-of-bounds reads and writes. Access to /dev/kvm and pt_mode=1 is required; a crafted vCPU sequence can corrupt host kernel state, hang the host, or terminate running guests.

CVSS severity8.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper validation in Linux KVM allows local users to hang hosts or crash guest VMs through Intel PT guest/host mode. The VMX code fails to keep tracing disabled before VM entry and trusts guest CPUID counts when selecting RTIT MSRs, causing invalid loads plus out-of-bounds reads and writes. Access to /dev/kvm and pt_mode=1 is required; a crafted vCPU sequence can corrupt host kernel state, hang the host, or terminate running guests.

The record

CVE
CVE-2024-53135
Published
Dec 4, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 4, 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=5.0
  2. Affected versionversion=f99e3daf94ff35dd4a878d32ff66e1fd35223ad6 <aa0d42cacf093a6fcca872edc954f6f812926a17
  3. Affected versionversion=f99e3daf94ff35dd4a878d32ff66e1fd35223ad6 <b8a1d572478b6f239061ee9578b2451bf2f021c2
  4. Affected versionversion=f99e3daf94ff35dd4a878d32ff66e1fd35223ad6 <b91bb0ce5cd7005b376eac690ec664c1b56372ec
  5. Affected versionversion=f99e3daf94ff35dd4a878d32ff66e1fd35223ad6 <c3742319d021f5aa3a0a8c828485fee14753f6de
  6. Affected versionversion=f99e3daf94ff35dd4a878d32ff66e1fd35223ad6 <d28b059ee4779b5102c5da6e929762520510e406
  7. Affected versionversion=f99e3daf94ff35dd4a878d32ff66e1fd35223ad6 <d4b42f926adcce4e5ec193c714afd9d37bba8e5b
  8. Affected versionversion=f99e3daf94ff35dd4a878d32ff66e1fd35223ad6 <e6716f4230a8784957273ddd27326264b27b9313

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.0; version=f99e3daf94ff35dd4a878d32ff66e1fd35223ad6 <aa0d42cacf093a6fcca872edc954f6f812926a17; version=f99e3daf94ff35dd4a878d32ff66e1fd35223ad6 <b8a1d572478b6f239061ee9578b2451bf2f021c2; version=f99e3daf94ff35dd4a878d32ff66e1fd35223ad6 <b91bb0ce5cd7005b376eac690ec664c1b56372ec; version=f99e3daf94ff35dd4a878d32ff66e1fd35223ad6 <c3742319d021f5aa3a0a8c828485fee14753f6de; version=f99e3daf94ff35dd4a878d32ff66e1fd35223ad6 <d28b059ee4779b5102c5da6e929762520510e406; version=f99e3daf94ff35dd4a878d32ff66e1fd35223ad6 <d4b42f926adcce4e5ec193c714afd9d37bba8e5b; version=f99e3daf94ff35dd4a878d32ff66e1fd35223ad6 <e6716f4230a8784957273ddd27326264b27b9313

Published CVSS scores

8.8Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application 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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