CVE-2024-42254Public exploit

Local kernel crash via pbuf error mishandling

Published Aug 8, 2024 · Updated May 11, 2026

NULL pointer dereference in Linux kernel 6.10 io_uring allows local users to crash the kernel through a provided-buffer-ring request. io_alloc_pbuf_ring() tests an ERR_PTR result as though only NULL indicated failure, leaving an invalid buffer-ring state that cleanup later dereferences. Low-privileged local access to io_uring is required, and successful triggering interrupts the host through a kernel fault.

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

NULL pointer dereference in Linux kernel 6.10 io_uring allows local users to crash the kernel through a provided-buffer-ring request. io_alloc_pbuf_ring() tests an ERR_PTR result as though only NULL indicated failure, leaving an invalid buffer-ring state that cleanup later dereferences. Low-privileged local access to io_uring is required, and successful triggering interrupts the host through a kernel fault.

The record

CVE
CVE-2024-42254
Published
Aug 8, 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. Aug 8, 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=46b1b3d81a7e99574e1a2f914086bc2fe382d79d <78aefac7efdffddf7889405b7c08e6e0f030fa35
  2. Affected versionversion=6.10
  3. Affected versionversion=87585b05757dc70545efb434669708d276125559 <68d19af95a353f5e2b021602180b65b303eba99d
  4. Affected versionversion=87585b05757dc70545efb434669708d276125559 <bcc87d978b834c298bbdd9c52454c5d0a946e97e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=46b1b3d81a7e99574e1a2f914086bc2fe382d79d <78aefac7efdffddf7889405b7c08e6e0f030fa35; version=6.10; version=87585b05757dc70545efb434669708d276125559 <68d19af95a353f5e2b021602180b65b303eba99d; version=87585b05757dc70545efb434669708d276125559 <bcc87d978b834c298bbdd9c52454c5d0a946e97e

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.

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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 exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

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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