CVE-2024-56725

Kernel crash via unchecked mailbox error pointer

Published Dec 29, 2024 · Updated May 11, 2026

Improper error handling in the OcteonTX2 NIC driver in Linux allows local users to crash the kernel through DCB configuration. The otx2_config_priority_flow_ctrl function dereferences the result of otx2_mbox_get_rsp without checking whether it is an error pointer. Reachability requires Marvell OcteonTX2 hardware, an active driver path, and a mailbox-response error; the invalid dereference interrupts the host.

CVSS severity5.5
Medium
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

Improper error handling in the OcteonTX2 NIC driver in Linux allows local users to crash the kernel through DCB configuration. The otx2_config_priority_flow_ctrl function dereferences the result of otx2_mbox_get_rsp without checking whether it is an error pointer. Reachability requires Marvell OcteonTX2 hardware, an active driver path, and a mailbox-response error; the invalid dereference interrupts the host.

The record

CVE
CVE-2024-56725
Published
Dec 29, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, 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

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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=5.18
  2. Affected versionversion=8e67558177f8f55dcffa47273c2af0a6f2ab9418 <54e8b501b3ea9371e4a9aa639c75b681fa5680f0
  3. Affected versionversion=8e67558177f8f55dcffa47273c2af0a6f2ab9418 <69297b0d3369488af259e3a7cf53d69157938ea1
  4. Affected versionversion=8e67558177f8f55dcffa47273c2af0a6f2ab9418 <6ee6cf42dc5230425cfce1ffefa5a8d8a99e6fce
  5. Affected versionversion=8e67558177f8f55dcffa47273c2af0a6f2ab9418 <b94052830e3cd3be7141789a5ce6e62cf9f620a4
  6. Affected versionversion=8e67558177f8f55dcffa47273c2af0a6f2ab9418 <b99db02209ca4c2e2f53b82049ea3cbc82b54895

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.18; version=8e67558177f8f55dcffa47273c2af0a6f2ab9418 <54e8b501b3ea9371e4a9aa639c75b681fa5680f0; version=8e67558177f8f55dcffa47273c2af0a6f2ab9418 <69297b0d3369488af259e3a7cf53d69157938ea1; version=8e67558177f8f55dcffa47273c2af0a6f2ab9418 <6ee6cf42dc5230425cfce1ffefa5a8d8a99e6fce; version=8e67558177f8f55dcffa47273c2af0a6f2ab9418 <b94052830e3cd3be7141789a5ce6e62cf9f620a4; version=8e67558177f8f55dcffa47273c2af0a6f2ab9418 <b99db02209ca4c2e2f53b82049ea3cbc82b54895

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/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-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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