CVE-2024-40908

Kernel crash via unset raw tracepoint run context

Published Jul 12, 2024 · Updated May 11, 2026

A NULL-pointer dereference in the Linux kernel allows local users to crash the system through a raw tracepoint BPF test run. The rawtp test_run callback invokes helpers such as bpf_get_attach_cookie without first setting task->bpf_ctx, so a helper touching that pointer dereferences an unset run context. A local account able to execute an affected BPF test run can interrupt the entire system, with no reported confidentiality or integrity impact.

CVSS severity5.5
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A NULL-pointer dereference in the Linux kernel allows local users to crash the system through a raw tracepoint BPF test run. The rawtp test_run callback invokes helpers such as bpf_get_attach_cookie without first setting task->bpf_ctx, so a helper touching that pointer dereferences an unset run context. A local account able to execute an affected BPF test run can interrupt the entire system, with no reported confidentiality or integrity impact.

The record

CVE
CVE-2024-40908
Published
Jul 12, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 12, 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=5.15
  2. Affected versionversion=7adfc6c9b315e174cf8743b21b7b691c8766791b <3708b6c2546c9eb34aead8a34a17e8ae69004e4d
  3. Affected versionversion=7adfc6c9b315e174cf8743b21b7b691c8766791b <789bd77c9342aa6125003871ae5c6034d0f6f9d2
  4. Affected versionversion=7adfc6c9b315e174cf8743b21b7b691c8766791b <ae0ba0ab7475a129ef7d449966edf677367efeb4
  5. Affected versionversion=7adfc6c9b315e174cf8743b21b7b691c8766791b <d0d1df8ba18abc57f28fb3bc053b2bf319367f2c
  6. Affected versionversion=7adfc6c9b315e174cf8743b21b7b691c8766791b <d387805d4b4a46ee01e3dae133c81b6d80195e5b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.15; version=7adfc6c9b315e174cf8743b21b7b691c8766791b <3708b6c2546c9eb34aead8a34a17e8ae69004e4d; version=7adfc6c9b315e174cf8743b21b7b691c8766791b <789bd77c9342aa6125003871ae5c6034d0f6f9d2; version=7adfc6c9b315e174cf8743b21b7b691c8766791b <ae0ba0ab7475a129ef7d449966edf677367efeb4; version=7adfc6c9b315e174cf8743b21b7b691c8766791b <d0d1df8ba18abc57f28fb3bc053b2bf319367f2c; version=7adfc6c9b315e174cf8743b21b7b691c8766791b <d387805d4b4a46ee01e3dae133c81b6d80195e5b

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

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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