CVE-2024-56728

Kernel crash via unchecked mailbox error pointer

Published Dec 29, 2024 · Updated May 11, 2026

Improper error handling in Linux 5.7 through 6.12.1 allows local users to crash the kernel through OcteonTX2 ethtool operations. The OcteonTX2 PF driver's pause-parameter and FEC handlers dereference an ERR_PTR from otx2_mbox_get_rsp instead of propagating the mailbox error. A low-privileged local user must issue affected ethtool operations against compatible Marvell hardware; a failed mailbox response can panic the kernel and interrupt 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 Linux 5.7 through 6.12.1 allows local users to crash the kernel through OcteonTX2 ethtool operations. The OcteonTX2 PF driver's pause-parameter and FEC handlers dereference an ERR_PTR from otx2_mbox_get_rsp instead of propagating the mailbox error. A low-privileged local user must issue affected ethtool operations against compatible Marvell hardware; a failed mailbox response can panic the kernel and interrupt the host.

The record

CVE
CVE-2024-56728
Published
Dec 29, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-754, 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=5.7
  2. Affected versionversion=75f36270990c7875c0091afb961ca37f52b6bc55 <05a6ce174c0c724e5914e1e5efd826bab8f382b4
  3. Affected versionversion=75f36270990c7875c0091afb961ca37f52b6bc55 <2db2194727b1f49a5096c1c3981adef1b7638733
  4. Affected versionversion=75f36270990c7875c0091afb961ca37f52b6bc55 <55c41b97001a09bb490ffa2e667e251d75d15ab1
  5. Affected versionversion=75f36270990c7875c0091afb961ca37f52b6bc55 <5ff9de1f2712cbca53da2e37d831eea7ffcb43b6
  6. Affected versionversion=75f36270990c7875c0091afb961ca37f52b6bc55 <6cda142cee032b8fe65ee11f78721721c3988feb
  7. Affected versionversion=75f36270990c7875c0091afb961ca37f52b6bc55 <c0f64fd73b60aee85f88c270c9d714ead27a7b7a
  8. Affected versionversion=75f36270990c7875c0091afb961ca37f52b6bc55 <e26f8eac6bb20b20fdb8f7dc695711ebce4c7c5c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.7; version=75f36270990c7875c0091afb961ca37f52b6bc55 <05a6ce174c0c724e5914e1e5efd826bab8f382b4; version=75f36270990c7875c0091afb961ca37f52b6bc55 <2db2194727b1f49a5096c1c3981adef1b7638733; version=75f36270990c7875c0091afb961ca37f52b6bc55 <55c41b97001a09bb490ffa2e667e251d75d15ab1; version=75f36270990c7875c0091afb961ca37f52b6bc55 <5ff9de1f2712cbca53da2e37d831eea7ffcb43b6; version=75f36270990c7875c0091afb961ca37f52b6bc55 <6cda142cee032b8fe65ee11f78721721c3988feb; version=75f36270990c7875c0091afb961ca37f52b6bc55 <c0f64fd73b60aee85f88c270c9d714ead27a7b7a; version=75f36270990c7875c0091afb961ca37f52b6bc55 <e26f8eac6bb20b20fdb8f7dc695711ebce4c7c5c

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CISA-ADPCVSS:3.1/AV:L/AC:L/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
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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