CVE-2024-46788

Kernel crash via osnoise thread-tracking race

Published Sep 18, 2024 · Updated Aug 5, 2026

NULL pointer dereference in Linux kernel 6.5 allows local users to crash the kernel through concurrent osnoise timerlat termination. The tracing/osnoise start_kthread() and stop_thread() paths can race without interface_lock, replace the tracked task, and pass a user-space thread to kthread_stop(). Local administrative access is required to run timerlat with user-space threads and rapidly terminate it; the resulting kernel OOPS interrupts the host.

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 6.5 allows local users to crash the kernel through concurrent osnoise timerlat termination. The tracing/osnoise start_kthread() and stop_thread() paths can race without interface_lock, replace the tracked task, and pass a user-space thread to kthread_stop(). Local administrative access is required to run timerlat with user-space threads and rapidly terminate it; the resulting kernel OOPS interrupts the host.

The record

CVE
CVE-2024-46788
Published
Sep 18, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=6.5
  2. Affected versionversion=e88ed227f639ebcb31ed4e5b88756b47d904584b <177e1cc2f41235c145041eed03ef5bab18f32328
  3. Affected versionversion=e88ed227f639ebcb31ed4e5b88756b47d904584b <27282d2505b402f39371fd60d19d95c01a4b6776
  4. Affected versionversion=e88ed227f639ebcb31ed4e5b88756b47d904584b <7a5f01828edf152c144d27cf63de446fdf2dc222

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=6.5; version=e88ed227f639ebcb31ed4e5b88756b47d904584b <177e1cc2f41235c145041eed03ef5bab18f32328; version=e88ed227f639ebcb31ed4e5b88756b47d904584b <27282d2505b402f39371fd60d19d95c01a4b6776; version=e88ed227f639ebcb31ed4e5b88756b47d904584b <7a5f01828edf152c144d27cf63de446fdf2dc222

Published CVSS scores

5.5NISTCVSS: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
Privilegesadmin
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.

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Technologies

Your stack

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Your stack

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