CVE-2023-52490

System crash via mislabeled migration mapping

Published Feb 29, 2024 · Updated May 23, 2026

NULL pointer dereference in the Linux kernel 6.3 and affected stable branches allows local users to crash the system during page migration. During migration, mm/migrate.c stores an anon_vma pointer in the target page's mapping field without PAGE_MAPPING_ANON, so page_mapping() treats it as a file mapping and dump_mapping() dereferences invalid data. The crash requires a race between page migration and memory offlining; published assessments report availability loss only.

CVSS severity5.5
Medium
EPSS probability0.28%
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 6.3 and affected stable branches allows local users to crash the system during page migration. During migration, mm/migrate.c stores an anon_vma pointer in the target page's mapping field without PAGE_MAPPING_ANON, so page_mapping() treats it as a file mapping and dump_mapping() dereferences invalid data. The crash requires a race between page migration and memory offlining; published assessments report availability loss only.

The record

CVE
CVE-2023-52490
Published
Feb 29, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 29, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=6.1.116 <6.2
  2. Affected versionversion=6.3
  3. Affected versionversion=64c8902ed4418317cd416c566f896bd4a92b2efc <3889a418b6eb9a1113fb989aaadecf2f64964767
  4. Affected versionversion=64c8902ed4418317cd416c566f896bd4a92b2efc <9128bfbc5c80d8f4874dd0a0424d1f5fb010df1b
  5. Affected versionversion=64c8902ed4418317cd416c566f896bd4a92b2efc <d1adb25df7111de83b64655a80b5a135adbded61
  6. Affected versionversion=8ca5f0ea52e1eef5e7dcbdff1d1afe602764ea93

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.1.116 <6.2; version=6.3; version=64c8902ed4418317cd416c566f896bd4a92b2efc <3889a418b6eb9a1113fb989aaadecf2f64964767; version=64c8902ed4418317cd416c566f896bd4a92b2efc <9128bfbc5c80d8f4874dd0a0424d1f5fb010df1b; version=64c8902ed4418317cd416c566f896bd4a92b2efc <d1adb25df7111de83b64655a80b5a135adbded61; version=8ca5f0ea52e1eef5e7dcbdff1d1afe602764ea93

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CISA-ADPCVSS: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-476NULL Pointer Dereference
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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