CVE-2024-35801

Kernel crash via stale XFD state

Published May 17, 2024 · Updated May 11, 2026

Denial of service in affected Linux kernel releases allows local users to crash x86 systems after CPU hotplug and FPU state use. The CPU-hotplug path resets MSR_IA32_XFD but leaves per-CPU xfd_state stale, so xfd_update_state can skip a required MSR write. A later XRSTOR raises #NM in kernel space and crashes the host; exposure requires x86 XFD support and a CPU-hotplug event.

CVSS severity5.5
Medium
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

Denial of service in affected Linux kernel releases allows local users to crash x86 systems after CPU hotplug and FPU state use. The CPU-hotplug path resets MSR_IA32_XFD but leaves per-CPU xfd_state stale, so xfd_update_state can skip a required MSR write. A later XRSTOR raises #NM in kernel space and crashes the host; exposure requires x86 XFD support and a CPU-hotplug event.

The record

CVE
CVE-2024-35801
Published
May 17, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 17, 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=5.16
  2. Affected versionversion=672365477ae8afca5a1cca98c1deb733235e4525 <10e4b5166df9ff7a2d5316138ca668b42d004422
  3. Affected versionversion=672365477ae8afca5a1cca98c1deb733235e4525 <1acbca933313aa866e39996904c9aca4d435c4cd
  4. Affected versionversion=672365477ae8afca5a1cca98c1deb733235e4525 <21c7c00dae55cb0e3810d5f9506b58f68475d41d
  5. Affected versionversion=672365477ae8afca5a1cca98c1deb733235e4525 <92b0f04e937665bde5768f3fcc622dcce44413d8
  6. Affected versionversion=672365477ae8afca5a1cca98c1deb733235e4525 <b61e3b7055ac6edee4be071c52f48c26472d2624

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.16; version=672365477ae8afca5a1cca98c1deb733235e4525 <10e4b5166df9ff7a2d5316138ca668b42d004422; version=672365477ae8afca5a1cca98c1deb733235e4525 <1acbca933313aa866e39996904c9aca4d435c4cd; version=672365477ae8afca5a1cca98c1deb733235e4525 <21c7c00dae55cb0e3810d5f9506b58f68475d41d; version=672365477ae8afca5a1cca98c1deb733235e4525 <92b0f04e937665bde5768f3fcc622dcce44413d8; version=672365477ae8afca5a1cca98c1deb733235e4525 <b61e3b7055ac6edee4be071c52f48c26472d2624
The Linux Kernel Organization · Linux Kernelversion=5.16; version=672365477ae8 <10e4b5166df9; version=672365477ae8 <1acbca933313; version=672365477ae8 <21c7c00dae55; version=672365477ae8 <92b0f04e9376; version=672365477ae8 <b61e3b7055ac

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5NVDCVSS: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-416Use After Free
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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