CVE-2024-38553

System hang via sleeping IRQ disable

Published Jun 19, 2024 · Updated May 11, 2026

Improper locking in the Linux kernel FEC Ethernet driver allows local users to hang the system through netpoll activity. The fec_poll_controller() callback invokes disable_irq() while netpoll is in atomic context, even though disable_irq() can sleep, creating a deadlock. Reachability requires local low-privileged access and an active FEC interface using netpoll; the documented consequence is an availability-only system hang.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in the Linux kernel FEC Ethernet driver allows local users to hang the system through netpoll activity. The fec_poll_controller() callback invokes disable_irq() while netpoll is in atomic context, even though disable_irq() can sleep, creating a deadlock. Reachability requires local low-privileged access and an active FEC interface using netpoll; the documented consequence is an availability-only system hang.

The record

CVE
CVE-2024-38553
Published
Jun 19, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 19, 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=3.2
  2. Affected versionversion=7f5c6addcdc039c1a7c435857e6284ecac5d97c8 <87bcbc9b7e0b43a69d44efa5f32f11e32d08fa6f
  3. Affected versionversion=7f5c6addcdc039c1a7c435857e6284ecac5d97c8 <accdd6b912c4219b8e056d1f1ad2e85bc66ee243
  4. Affected versionversion=7f5c6addcdc039c1a7c435857e6284ecac5d97c8 <c2e0c58b25a0a0c37ec643255558c5af4450c9f5
  5. Affected versionversion=7f5c6addcdc039c1a7c435857e6284ecac5d97c8 <d38625f71950e79e254515c5fc585552dad4b33e
  6. Affected versionversion=7f5c6addcdc039c1a7c435857e6284ecac5d97c8 <e2348d8c61d03feece1de4c05f72e6e99f74c650

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.2; version=7f5c6addcdc039c1a7c435857e6284ecac5d97c8 <87bcbc9b7e0b43a69d44efa5f32f11e32d08fa6f; version=7f5c6addcdc039c1a7c435857e6284ecac5d97c8 <accdd6b912c4219b8e056d1f1ad2e85bc66ee243; version=7f5c6addcdc039c1a7c435857e6284ecac5d97c8 <c2e0c58b25a0a0c37ec643255558c5af4450c9f5; version=7f5c6addcdc039c1a7c435857e6284ecac5d97c8 <d38625f71950e79e254515c5fc585552dad4b33e; version=7f5c6addcdc039c1a7c435857e6284ecac5d97c8 <e2348d8c61d03feece1de4c05f72e6e99f74c650

Published CVSS scores

5.5NIST NVDCVSS: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 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-667Improper Locking
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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