CVE-2024-35993

Kernel memory corruption via folio type confusion

Published May 20, 2024 · Updated Aug 5, 2026

Memory corruption in affected Linux 6.6 through 6.9 prerelease kernels allows local users to corrupt kernel state via a folio-split race. folio_test_hugetlb reads changing page state during a concurrent transparent huge-page split, mislabels a non-hugetlb folio, and causes hugetlb paths to interpret and mutate overlapping metadata. Ordinary unprivileged local execution is sufficient; resulting operations provide kernel-memory read and write primitives, while CONFIG_DEBUG_VM can turn the fault into an oops or panic.

CVSS severity7.8
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in affected Linux 6.6 through 6.9 prerelease kernels allows local users to corrupt kernel state via a folio-split race. folio_test_hugetlb reads changing page state during a concurrent transparent huge-page split, mislabels a non-hugetlb folio, and causes hugetlb paths to interpret and mutate overlapping metadata. Ordinary unprivileged local execution is sufficient; resulting operations provide kernel-memory read and write primitives, while CONFIG_DEBUG_VM can turn the fault into an oops or panic.

The record

CVE
CVE-2024-35993
Published
May 20, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.6
  2. Affected versionversion=9c5ccf2db04b8d7c3df363fdd4856c2b79ab2c6a <2431b5f2650dfc47ce782d1ca7b02d6b3916976f
  3. Affected versionversion=9c5ccf2db04b8d7c3df363fdd4856c2b79ab2c6a <9fdcc5b6359dfdaa52a55033bf50e2cedd66eb32
  4. Affected versionversion=9c5ccf2db04b8d7c3df363fdd4856c2b79ab2c6a <d99e3140a4d33e26066183ff727d8f02f56bec64

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.6; version=9c5ccf2db04b8d7c3df363fdd4856c2b79ab2c6a <2431b5f2650dfc47ce782d1ca7b02d6b3916976f; version=9c5ccf2db04b8d7c3df363fdd4856c2b79ab2c6a <9fdcc5b6359dfdaa52a55033bf50e2cedd66eb32; version=9c5ccf2db04b8d7c3df363fdd4856c2b79ab2c6a <d99e3140a4d33e26066183ff727d8f02f56bec64

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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

T1068Exploitation for Privilege Escalation

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

See the directory against your own environment.

Your stack

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