CVE-2024-26768

Boot crash via LoongArch ACPI array overflow

Published Apr 3, 2024 · Updated Aug 5, 2026

Buffer overflow in Linux LoongArch ACPI parsing allows local users to crash affected kernels during boot through a large MADT. The parser indexes physical-core entries into acpi_core_pic sized by the smaller logical NR_CPUS limit, writing past the array when the MADT lists more cores. Triggering it requires a LoongArch platform whose MADT exceeds NR_CPUS; the resulting paging fault prevents the kernel from booting.

CVSS severity6.4
Medium
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Buffer overflow in Linux LoongArch ACPI parsing allows local users to crash affected kernels during boot through a large MADT. The parser indexes physical-core entries into acpi_core_pic sized by the smaller logical NR_CPUS limit, writing past the array when the MADT lists more cores. Triggering it requires a LoongArch platform whose MADT exceeds NR_CPUS; the resulting paging fault prevents the kernel from booting.

The record

CVE
CVE-2024-26768
Published
Apr 3, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-120, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 3, 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=5.19
  2. Affected versionversion=fa96b57c149061f71a70bd6582d995f6424fbbf4 <0f6810e39898af2d2cabd9313e4dbc945fb5dfdd
  3. Affected versionversion=fa96b57c149061f71a70bd6582d995f6424fbbf4 <4551b30525cf3d2f026b92401ffe241eb04dfebe
  4. Affected versionversion=fa96b57c149061f71a70bd6582d995f6424fbbf4 <88e189bd16e5889e44a41b3309558ebab78b9280

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=fa96b57c149061f71a70bd6582d995f6424fbbf4 <0f6810e39898af2d2cabd9313e4dbc945fb5dfdd; version=fa96b57c149061f71a70bd6582d995f6424fbbf4 <4551b30525cf3d2f026b92401ffe241eb04dfebe; version=fa96b57c149061f71a70bd6582d995f6424fbbf4 <88e189bd16e5889e44a41b3309558ebab78b9280

Published CVSS scores

6.4CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo