CVE-2024-56649

Local kernel crash via unsupported ENETC register access

Published Dec 27, 2024 · Updated May 11, 2026

Denial of service in the Linux kernel ENETC driver allows local users to crash the host through an MQPRIO configuration request. The shared enetc_setup_tc_mqprio path calls enetc_change_preemptible_tcs for service interfaces whose hardware port pointer is null, then accesses an unimplemented register. Reachability requires a local user authorized to configure MQPRIO on an ENETC VF or unsupported PF; the documented VF path terminates the kernel, while affected PF paths perform invalid register accesses without the same crash.

CVSS severity5.5
Medium
EPSS probability0.23%
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

Denial of service in the Linux kernel ENETC driver allows local users to crash the host through an MQPRIO configuration request. The shared enetc_setup_tc_mqprio path calls enetc_change_preemptible_tcs for service interfaces whose hardware port pointer is null, then accesses an unimplemented register. Reachability requires a local user authorized to configure MQPRIO on an ENETC VF or unsupported PF; the documented VF path terminates the kernel, while affected PF paths perform invalid register accesses without the same crash.

The record

CVE
CVE-2024-56649
Published
Dec 27, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 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=6.4
  2. Affected versionversion=827145392a4aad635b93e5235b7d7fecc2fa31c7 <66127f0d1ecf00604aeab71132bde398fd9ec7c9
  3. Affected versionversion=827145392a4aad635b93e5235b7d7fecc2fa31c7 <b2420b8c81ec674552d00c55d46245e5c184b260
  4. Affected versionversion=827145392a4aad635b93e5235b7d7fecc2fa31c7 <b718b68a9964181e24d15138a09ce95785a19002

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.4; version=827145392a4aad635b93e5235b7d7fecc2fa31c7 <66127f0d1ecf00604aeab71132bde398fd9ec7c9; version=827145392a4aad635b93e5235b7d7fecc2fa31c7 <b2420b8c81ec674552d00c55d46245e5c184b260; version=827145392a4aad635b93e5235b7d7fecc2fa31c7 <b718b68a9964181e24d15138a09ce95785a19002

Published CVSS scores

5.5CanonicalCVSS: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.

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

T1499.004Application or System Exploitation

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