CVE-2024-42293

Kernel crash via stray page-table stack read

Published Aug 17, 2024 · Updated Aug 5, 2026

Out-of-bounds read in arm64 fast GUP in Linux 6.9 through 6.10.2 allows local users to crash the kernel during lockless page-table walks. Runtime-folded p4d_offset_lockless returns a pointer to a caller stack variable, and pud_offset_lockless offsets from it instead of a real page-table page. Reachability requires 16 KiB pages, four page-table levels, and runtime folding because LPA2 is unavailable; successful triggering causes an oops and service interruption.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in arm64 fast GUP in Linux 6.9 through 6.10.2 allows local users to crash the kernel during lockless page-table walks. Runtime-folded p4d_offset_lockless returns a pointer to a caller stack variable, and pud_offset_lockless offsets from it instead of a real page-table page. Reachability requires 16 KiB pages, four page-table levels, and runtime folding because LPA2 is unavailable; successful triggering causes an oops and service interruption.

The record

CVE
CVE-2024-42293
Published
Aug 17, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 17, 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=0dd4f60a2c76938c2625f6c630c225699d97608b <36639013b3462c06ff8e3400a427f775b4fc97f5
  2. Affected versionversion=0dd4f60a2c76938c2625f6c630c225699d97608b <78672d49d3eebbcda3589f4d6e589caf357c5a59
  3. Affected versionversion=6.9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0dd4f60a2c76938c2625f6c630c225699d97608b <36639013b3462c06ff8e3400a427f775b4fc97f5; version=0dd4f60a2c76938c2625f6c630c225699d97608b <78672d49d3eebbcda3589f4d6e589caf357c5a59; version=6.9

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.

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

CWE-125Out-of-bounds Read
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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