CVE-2024-42134

Guest crash via NULL virtqueue callback

Published Jul 30, 2024 · Updated May 11, 2026

NULL pointer dereference in Linux 6.8 through 6.9.8 allows local users to crash a guest during legacy virtio-pci device attachment. The vp_del_vqs function calls the unset vp_dev->is_avq callback while classifying queues because virtio_pci_legacy never assigns it. Triggering the flaw requires local virtualization-management access capable of attaching the affected device; the bounded consequence is a guest 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

NULL pointer dereference in Linux 6.8 through 6.9.8 allows local users to crash a guest during legacy virtio-pci device attachment. The vp_del_vqs function calls the unset vp_dev->is_avq callback while classifying queues because virtio_pci_legacy never assigns it. Triggering the flaw requires local virtualization-management access capable of attaching the affected device; the bounded consequence is a guest crash.

The record

CVE
CVE-2024-42134
Published
Jul 30, 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. Jul 30, 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=6.8
  2. Affected versionversion=fd27ef6b44bec26915c5b2b22c13856d9f0ba17a <5e2024b0b9b3d5709e3f7e9b92951d7e29154106
  3. Affected versionversion=fd27ef6b44bec26915c5b2b22c13856d9f0ba17a <c8fae27d141a32a1624d0d0d5419d94252824498

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.8; version=fd27ef6b44bec26915c5b2b22c13856d9f0ba17a <5e2024b0b9b3d5709e3f7e9b92951d7e29154106; version=fd27ef6b44bec26915c5b2b22c13856d9f0ba17a <c8fae27d141a32a1624d0d0d5419d94252824498

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-476NULL Pointer Dereference
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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