CVE-2024-56628

Local kernel compromise via invalid huge-page cleanup

Published Dec 27, 2024 · Updated Aug 5, 2026

Memory corruption in Linux on LoongArch allows local users to compromise kernel confidentiality, integrity, and availability during huge-page cleanup. The generic huge_pte_clear() writes an invalid value that LoongArch later treats as a valid page-table pointer, causing free_pte_range() to free the wrong memory. An unprivileged local account can deterministically reach the path with userfaultfd, a poisoned hugetlb mapping, and unmapping or process exit, causing bad-page state and kernel taint.

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 Linux on LoongArch allows local users to compromise kernel confidentiality, integrity, and availability during huge-page cleanup. The generic huge_pte_clear() writes an invalid value that LoongArch later treats as a valid page-table pointer, causing free_pte_range() to free the wrong memory. An unprivileged local account can deterministically reach the path with userfaultfd, a poisoned hugetlb mapping, and unmapping or process exit, causing bad-page state and kernel taint.

The record

CVE
CVE-2024-56628
Published
Dec 27, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 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=09cfefb7fa70c3af011b0db0a513fd80b2f18abc <7cd1f5f77925ae905a57296932f0f9ef0dc364f8
  2. Affected versionversion=09cfefb7fa70c3af011b0db0a513fd80b2f18abc <7dfbf011a57b9e1a40f5ce8080a53c497e105c6c
  3. Affected versionversion=09cfefb7fa70c3af011b0db0a513fd80b2f18abc <9b602190cf2d8ac957be0011e418ed6c3b49b9a3
  4. Affected versionversion=09cfefb7fa70c3af011b0db0a513fd80b2f18abc <dba3c45e333a3a2a01395b5f5e5f88f8baba74e4
  5. Affected versionversion=5.19

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=09cfefb7fa70c3af011b0db0a513fd80b2f18abc <7cd1f5f77925ae905a57296932f0f9ef0dc364f8; version=09cfefb7fa70c3af011b0db0a513fd80b2f18abc <7dfbf011a57b9e1a40f5ce8080a53c497e105c6c; version=09cfefb7fa70c3af011b0db0a513fd80b2f18abc <9b602190cf2d8ac957be0011e418ed6c3b49b9a3; version=09cfefb7fa70c3af011b0db0a513fd80b2f18abc <dba3c45e333a3a2a01395b5f5e5f88f8baba74e4; version=5.19

Published CVSS scores

7.8Canonical UbuntuCVSS: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.

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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

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

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Your stack

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