CVE-2024-38573Network attack vector

System crash via unchecked CPU policy pointer

Published Jun 19, 2024 · Updated May 11, 2026

NULL pointer dereference in the Linux kernel allows remote attackers to crash systems through CPPC CPU-frequency rate queries. cppc_cpufreq_get_rate() and hisi_cppc_cpufreq_get_rate() dereference the policy returned by cpufreq_cpu_get() without first checking for NULL. Reachability requires an active CPPC CPU-frequency path and a CPU lookup with no policy; public records do not identify the remote request path.

CVSS severity7.5
High
EPSS probability1.00%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel allows remote attackers to crash systems through CPPC CPU-frequency rate queries. cppc_cpufreq_get_rate() and hisi_cppc_cpufreq_get_rate() dereference the policy returned by cpufreq_cpu_get() without first checking for NULL. Reachability requires an active CPPC CPU-frequency path and a CPU lookup with no policy; public records do not identify the remote request path.

The record

CVE
CVE-2024-38573
Published
Jun 19, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 19, 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

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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=5.11
  2. Affected versionversion=a28b2bfc099c6b9caa6ef697660408e076a32019 <769c4f355b7962895205b86ad35617873feef9a5
  3. Affected versionversion=a28b2bfc099c6b9caa6ef697660408e076a32019 <9a185cc5a79ba408e1c73375706630662304f618
  4. Affected versionversion=a28b2bfc099c6b9caa6ef697660408e076a32019 <b18daa4ec727c0266de5bfc78e818d168cc4aedf
  5. Affected versionversion=a28b2bfc099c6b9caa6ef697660408e076a32019 <cf7de25878a1f4508c69dc9f6819c21ba177dbfe
  6. Affected versionversion=a28b2bfc099c6b9caa6ef697660408e076a32019 <dfec15222529d22b15e5b0d63572a9e39570cab4
  7. Affected versionversion=a28b2bfc099c6b9caa6ef697660408e076a32019 <f84b9b25d045e67a7eee5e73f21278c8ab06713c

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.11; version=a28b2bfc099c6b9caa6ef697660408e076a32019 <769c4f355b7962895205b86ad35617873feef9a5; version=a28b2bfc099c6b9caa6ef697660408e076a32019 <9a185cc5a79ba408e1c73375706630662304f618; version=a28b2bfc099c6b9caa6ef697660408e076a32019 <b18daa4ec727c0266de5bfc78e818d168cc4aedf; version=a28b2bfc099c6b9caa6ef697660408e076a32019 <cf7de25878a1f4508c69dc9f6819c21ba177dbfe; version=a28b2bfc099c6b9caa6ef697660408e076a32019 <dfec15222529d22b15e5b0d63572a9e39570cab4; version=a28b2bfc099c6b9caa6ef697660408e076a32019 <f84b9b25d045e67a7eee5e73f21278c8ab06713c
Linux Foundation · ACRNversion=a28b2bfc099c <cf7de25878a1
Linux Foundation · Linux Kernelversion=5.11; version=a28b2bfc099c <769c4f355b79; version=a28b2bfc099c <9a185cc5a79b; version=a28b2bfc099c <b18daa4ec727; version=a28b2bfc099c <dfec15222529; version=a28b2bfc099c <f84b9b25d045

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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