CVE-2024-25744Public exploit

Guest compromise via injected int80 syscalls

Published Feb 12, 2024 · Updated May 7, 2025

Protection mechanism failure in Linux kernel before 6.6.7 allows local users with VMM access to manipulate a confidential guest. The TDX and SEV handlers accept a VMM-injected external interrupt on vector 0x80 as a userspace 32-bit syscall, so the current guest registers select the syscall and arguments. Control of the VMM is required; injected calls can alter guest execution, expose data, execute code, or crash the guest.

CVSS severity8.8
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Protection mechanism failure in Linux kernel before 6.6.7 allows local users with VMM access to manipulate a confidential guest. The TDX and SEV handlers accept a VMM-injected external interrupt on vector 0x80 as a userspace 32-bit syscall, so the current guest registers select the syscall and arguments. Control of the VMM is required; injected calls can alter guest execution, expose data, execute code, or crash the guest.

The record

CVE
CVE-2024-25744
Published
Feb 12, 2024
Updated
May 7, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-693, T1499
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Feb 12, 2024CVE publishedPublication date reported by the CVE source.
  2. May 7, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
5.6OracleCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
8.8CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-693Protection Mechanism Failure
T1499Endpoint Denial of Service

Public exploit references

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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