CVE-2024-56674

Kernel crash via premature transmit-queue reset

Published Dec 27, 2024 · Updated May 11, 2026

Resource-lifecycle error in Linux 6.11 allows local users to crash the kernel by cycling a virtio-net interface under heavy transmit load. In virtnet_enable_queue_pair(), netdev_tx_reset_queue() resets BQL before delayed TX completions from a prior close are consumed by the next NAPI poll. Triggering the crash requires local interface control, repeated close/open cycles, and heavy transmit traffic; the bounded impact is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource-lifecycle error in Linux 6.11 allows local users to crash the kernel by cycling a virtio-net interface under heavy transmit load. In virtnet_enable_queue_pair(), netdev_tx_reset_queue() resets BQL before delayed TX completions from a prior close are consumed by the next NAPI poll. Triggering the crash requires local interface control, repeated close/open cycles, and heavy transmit traffic; the bounded impact is a kernel crash.

The record

CVE
CVE-2024-56674
Published
Dec 27, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-672, T1499
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

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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=6.11
  2. Affected versionversion=c8bd1f7f3e61fc6c562c806045f3ccd2cc819c01 <3ddccbefebdbe0c4c72a248676e4d39ac66a8e26
  3. Affected versionversion=c8bd1f7f3e61fc6c562c806045f3ccd2cc819c01 <b4294d4ac61fbb382811a1d64eaf81f446ce2af4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.11; version=c8bd1f7f3e61fc6c562c806045f3ccd2cc819c01 <3ddccbefebdbe0c4c72a248676e4d39ac66a8e26; version=c8bd1f7f3e61fc6c562c806045f3ccd2cc819c01 <b4294d4ac61fbb382811a1d64eaf81f446ce2af4

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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-672Operation on a Resource after Expiration or Release
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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