CVE-2024-46785

Kernel crash via poisoned eventfs child list

Published Sep 18, 2024 · Updated May 23, 2026

A null-pointer dereference in affected Linux kernel eventfs releases allows local users to crash the kernel through concurrent tracefs activity. eventfs_remove_rec removes ei_child with list_del(), poisoning the link while eventfs_iterate can still traverse the SRCU-protected list and dereference ei_child->is_freed. Local access with permission to add and remove kprobe events while enumerating their eventfs directory is required, and successful exploitation causes a kernel panic rather than data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.22%
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 affected Linux kernel eventfs releases allows local users to crash the kernel through concurrent tracefs activity. eventfs_remove_rec removes ei_child with list_del(), poisoning the link while eventfs_iterate can still traverse the SRCU-protected list and dereference ei_child->is_freed. Local access with permission to add and remove kprobe events while enumerating their eventfs directory is required, and successful exploitation causes a kernel panic rather than data disclosure or modification.

The record

CVE
CVE-2024-46785
Published
Sep 18, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=43aa6f97c2d03a52c1ddb86768575fc84344bdbb <d2603279c7d645bf0d11fa253b23f1ab48fc8d3c
  2. Affected versionversion=43aa6f97c2d03a52c1ddb86768575fc84344bdbb <f579d17a86448779f9642ad8baca6e3036a8e2d6
  3. Affected versionversion=5a43badefe0eccca0c26144c0a44b8d417ce8103
  4. Affected versionversion=5dfb04100326f70e3b2d2872c2476ed20b804837 <05e08297c3c298d8ec28e5a5adb55840312dd87e
  5. Affected versionversion=6.6.18 <6.6.51
  6. Affected versionversion=6.7.6 <6.8
  7. Affected versionversion=6.8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=43aa6f97c2d03a52c1ddb86768575fc84344bdbb <d2603279c7d645bf0d11fa253b23f1ab48fc8d3c; version=43aa6f97c2d03a52c1ddb86768575fc84344bdbb <f579d17a86448779f9642ad8baca6e3036a8e2d6; version=5a43badefe0eccca0c26144c0a44b8d417ce8103; version=5dfb04100326f70e3b2d2872c2476ed20b804837 <05e08297c3c298d8ec28e5a5adb55840312dd87e; version=6.6.18 <6.6.51; version=6.7.6 <6.8; version=6.8

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.7SUSECVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.5UbuntuCVSS: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

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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.

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Technologies

Your stack

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Your stack

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