CVE-2024-42258

Service interruption via forced huge-page alignment

Published Aug 12, 2024 · Updated Aug 5, 2026

Resource exhaustion in affected Linux kernel builds allows local users to interrupt 32-bit processes through large anonymous mappings. The __thp_get_unmapped_area function tests CONFIG_32BIT, which is unset on x86_32, and therefore continues to pad and align mappings to huge-page boundaries instead of returning normal placement. The flaw requires low-privileged local code on a 32-bit system and can consume its constrained virtual address space until required mappings fail.

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

Resource exhaustion in affected Linux kernel builds allows local users to interrupt 32-bit processes through large anonymous mappings. The __thp_get_unmapped_area function tests CONFIG_32BIT, which is unset on x86_32, and therefore continues to pad and align mappings to huge-page boundaries instead of returning normal placement. The flaw requires low-privileged local code on a 32-bit system and can consume its constrained virtual address space until required mappings fail.

The record

CVE
CVE-2024-42258
Published
Aug 12, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-770, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=4ef9ad19e17676b9ef071309bc62020e2373705d <7e1f4efb8d6140b2ec79bf760c43e1fc186e8dfc
  2. Affected versionversion=4ef9ad19e17676b9ef071309bc62020e2373705d <d9592025000b3cf26c742f3505da7b83aedc26d5
  3. Affected versionversion=6.1.81 <6.1.105
  4. Affected versionversion=6.7.6 <6.8
  5. Affected versionversion=6.8
  6. Affected versionversion=6ea9aa8d97e6563676094cb35755884173269555 <a5c399fe433a115e9d3693169b5f357f3194af0a
  7. Affected versionversion=7432376c913381c5f24d373a87ff629bbde94b47
  8. Affected versionversion=87632bc9ecff5ded93433bc0fca428019bdd1cfe <89f2914dd4b47d2fad3deef0d700f9526d98d11f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4ef9ad19e17676b9ef071309bc62020e2373705d <7e1f4efb8d6140b2ec79bf760c43e1fc186e8dfc; version=4ef9ad19e17676b9ef071309bc62020e2373705d <d9592025000b3cf26c742f3505da7b83aedc26d5; version=6.1.81 <6.1.105; version=6.7.6 <6.8; version=6.8; version=6ea9aa8d97e6563676094cb35755884173269555 <a5c399fe433a115e9d3693169b5f357f3194af0a; version=7432376c913381c5f24d373a87ff629bbde94b47; version=87632bc9ecff5ded93433bc0fca428019bdd1cfe <89f2914dd4b47d2fad3deef0d700f9526d98d11f

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.3SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
4.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499Endpoint Denial of Service

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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