CVE-2024-50017

System halt via oversized identity mappings

Published Oct 21, 2024 · Updated May 11, 2026

Improper identity mapping in the Linux kernel allows local users to halt UV systems through processor speculation into BIOS-reserved regions. ident_pud_init() maps a full 1 GB page for a partial request as small as 4 KB, extending the identity map into addresses the BIOS marked reserved. Exploitation requires local low-privileged access and an affected x86 UV system; the bounded consequence is a system halt.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper identity mapping in the Linux kernel allows local users to halt UV systems through processor speculation into BIOS-reserved regions. ident_pud_init() maps a full 1 GB page for a partial request as small as 4 KB, extending the identity map into addresses the BIOS marked reserved. Exploitation requires local low-privileged access and an affected x86 UV system; the bounded consequence is a system halt.

The record

CVE
CVE-2024-50017
Published
Oct 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 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=4.12
  2. Affected versionversion=66aad4fdf2bf0af29c7decb4433dc5ec6c7c5451 <a23823098ab2c277c14fc110b97d8d5c83597195
  3. Affected versionversion=66aad4fdf2bf0af29c7decb4433dc5ec6c7c5451 <cc31744a294584a36bf764a0ffa3255a8e69f036
  4. Affected versionversion=66aad4fdf2bf0af29c7decb4433dc5ec6c7c5451 <d113f9723f2bfd9c6feeb899b8ddbee6b8a6e01f
  5. Affected versionversion=66aad4fdf2bf0af29c7decb4433dc5ec6c7c5451 <d80a99892f7a992d103138fa4636b2c33abd6740

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.12; version=66aad4fdf2bf0af29c7decb4433dc5ec6c7c5451 <a23823098ab2c277c14fc110b97d8d5c83597195; version=66aad4fdf2bf0af29c7decb4433dc5ec6c7c5451 <cc31744a294584a36bf764a0ffa3255a8e69f036; version=66aad4fdf2bf0af29c7decb4433dc5ec6c7c5451 <d113f9723f2bfd9c6feeb899b8ddbee6b8a6e01f; version=66aad4fdf2bf0af29c7decb4433dc5ec6c7c5451 <d80a99892f7a992d103138fa4636b2c33abd6740

Published CVSS scores

5.5NIST NVDCVSS: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

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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