CVE-2024-42317

Local denial of service via oversized page-cache collapse

Published Aug 17, 2024 · Updated May 11, 2026

Improper huge-page handling in Linux 5.17 through 6.10.2 allows local users to cause a kernel availability failure via file operations. In mm/huge_memory.c, the collapse path can create a 512 MB PMD-sized page-cache entry on ARM64 with 64 KB base pages, exceeding MAX_PAGECACHE_ORDER before xarray splits the entry. The path requires a writable mapped file, MADV_COLLAPSE, and a hole-punch operation; the demonstrated result is an xas_split_alloc warning, with no reported data disclosure or integrity impact.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper huge-page handling in Linux 5.17 through 6.10.2 allows local users to cause a kernel availability failure via file operations. In mm/huge_memory.c, the collapse path can create a 512 MB PMD-sized page-cache entry on ARM64 with 64 KB base pages, exceeding MAX_PAGECACHE_ORDER before xarray splits the entry. The path requires a writable mapped file, MADV_COLLAPSE, and a hole-punch operation; the demonstrated result is an xas_split_alloc warning, with no reported data disclosure or integrity impact.

The record

CVE
CVE-2024-42317
Published
Aug 17, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 17, 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=5.17
  2. Affected versionversion=6b24ca4a1a8d4ee3221d6d44ddbb99f542e4bda3 <d659b715e94ac039803d7601505d3473393fc0be
  3. Affected versionversion=6b24ca4a1a8d4ee3221d6d44ddbb99f542e4bda3 <e60f62f75c99740a28e2bf7e6044086033012a16

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.17; version=6b24ca4a1a8d4ee3221d6d44ddbb99f542e4bda3 <d659b715e94ac039803d7601505d3473393fc0be; version=6b24ca4a1a8d4ee3221d6d44ddbb99f542e4bda3 <e60f62f75c99740a28e2bf7e6044086033012a16

Published CVSS scores

5.5CanonicalCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

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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