CVE-2024-46822

Kernel crash via missing ACPI CPU entry

Published Sep 27, 2024 · Updated May 11, 2026

NULL pointer dereference in the arm64 ACPI CPU-mapping path in Linux 3.7 and later causes a kernel crash when a CPU entry is missing. get_cpu_for_acpi_id() maps an ACPI identifier back to a CPU and dereferences cpu_madt_gicc[cpu] without rejecting a missing entry left when the MPIDR check fails. No trigger path has been established, and the affected code is confined to arm64 systems using ACPI CPU enumeration, so practical reachability remains unverified.

CVSS severityUnavailable
Unscored
EPSS probability0.25%
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 arm64 ACPI CPU-mapping path in Linux 3.7 and later causes a kernel crash when a CPU entry is missing. get_cpu_for_acpi_id() maps an ACPI identifier back to a CPU and dereferences cpu_madt_gicc[cpu] without rejecting a missing entry left when the MPIDR check fails. No trigger path has been established, and the affected code is confined to arm64 systems using ACPI CPU enumeration, so practical reachability remains unverified.

The record

CVE
CVE-2024-46822
Published
Sep 27, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 27, 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=0be7320a635c2e434e8b67e0e9474a85ceb421c4 <2488444274c70038eb6b686cba5f1ce48ebb9cdd
  2. Affected versionversion=0be7320a635c2e434e8b67e0e9474a85ceb421c4 <40cae0df42e5e7f7a1c0f32deed9c4027c1ba94e
  3. Affected versionversion=0be7320a635c2e434e8b67e0e9474a85ceb421c4 <4c3b21204abb4fa3ab310fbbb5cf7f0e85f3a1bc
  4. Affected versionversion=0be7320a635c2e434e8b67e0e9474a85ceb421c4 <62ca6d3a905b4c40cd942f3cc645a6718f8bc7e7
  5. Affected versionversion=0be7320a635c2e434e8b67e0e9474a85ceb421c4 <945be49f4e832a9184c313fdf8917475438a795b
  6. Affected versionversion=0be7320a635c2e434e8b67e0e9474a85ceb421c4 <bc7fbb37e3d2df59336eadbd6a56be632e3c7df7
  7. Affected versionversion=0be7320a635c2e434e8b67e0e9474a85ceb421c4 <f57769ff6fa7f97f1296965f20e8a2bb3ee9fd0f
  8. Affected versionversion=3.7

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=0be7320a635c2e434e8b67e0e9474a85ceb421c4 <2488444274c70038eb6b686cba5f1ce48ebb9cdd; version=0be7320a635c2e434e8b67e0e9474a85ceb421c4 <40cae0df42e5e7f7a1c0f32deed9c4027c1ba94e; version=0be7320a635c2e434e8b67e0e9474a85ceb421c4 <4c3b21204abb4fa3ab310fbbb5cf7f0e85f3a1bc; version=0be7320a635c2e434e8b67e0e9474a85ceb421c4 <62ca6d3a905b4c40cd942f3cc645a6718f8bc7e7; version=0be7320a635c2e434e8b67e0e9474a85ceb421c4 <945be49f4e832a9184c313fdf8917475438a795b; version=0be7320a635c2e434e8b67e0e9474a85ceb421c4 <bc7fbb37e3d2df59336eadbd6a56be632e3c7df7; version=0be7320a635c2e434e8b67e0e9474a85ceb421c4 <f57769ff6fa7f97f1296965f20e8a2bb3ee9fd0f; version=3.7

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference

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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