CVE-2024-56742

Local denial of service via leaked migration pages

Published Dec 29, 2024 · Updated May 11, 2026

A memory leak in Linux kernel vfio/mlx5 5.18 through 6.11.10 and 6.12 through 6.12.1 allows local users to consume unreclaimed memory. In mlx5vf_add_migration_pages(), pages allocated in the current batch are not freed when adding that batch to the scatter-gather table fails. Reaching the flaw requires low-privileged local access to the mlx5 VF migration path, and repeated failures can interrupt service by depleting memory.

CVSS severity3.3
Low
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

A memory leak in Linux kernel vfio/mlx5 5.18 through 6.11.10 and 6.12 through 6.12.1 allows local users to consume unreclaimed memory. In mlx5vf_add_migration_pages(), pages allocated in the current batch are not freed when adding that batch to the scatter-gather table fails. Reaching the flaw requires low-privileged local access to the mlx5 VF migration path, and repeated failures can interrupt service by depleting memory.

The record

CVE
CVE-2024-56742
Published
Dec 29, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 29, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=5.18
  2. Affected versionversion=6fadb021266d03c5fd7bca2cfa1607efd246dad1 <22e87bf3f77c18f5982c19ffe2732ef0c7a25f16
  3. Affected versionversion=6fadb021266d03c5fd7bca2cfa1607efd246dad1 <769fe4ce444b646b0bf6ac308de80686c730c7df
  4. Affected versionversion=6fadb021266d03c5fd7bca2cfa1607efd246dad1 <c44f1b2ddfa81c8d7f8e9b6bc76c427bc00e69d5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.18; version=6fadb021266d03c5fd7bca2cfa1607efd246dad1 <22e87bf3f77c18f5982c19ffe2732ef0c7a25f16; version=6fadb021266d03c5fd7bca2cfa1607efd246dad1 <769fe4ce444b646b0bf6ac308de80686c730c7df; version=6fadb021266d03c5fd7bca2cfa1607efd246dad1 <c44f1b2ddfa81c8d7f8e9b6bc76c427bc00e69d5

Published CVSS scores

5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.3UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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-401Missing Release of Memory after Effective Lifetime
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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