CVE-2024-46824

Kernel crash via missing invalidation callback

Published Sep 27, 2024 · Updated May 11, 2026

NULL pointer dereference in Linux kernel iommufd 6.8 through 6.10.9 allows local users to crash the kernel via an invalidation ioctl. iommufd_hwpt_invalidate calls a driver's missing cache_invalidate_user operation without first requiring that callback, transferring control to address zero. Reachability requires local access to an iommufd nesting context backed by a driver without that operation; existing upstream nesting drivers implement it.

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 iommufd 6.8 through 6.10.9 allows local users to crash the kernel via an invalidation ioctl. iommufd_hwpt_invalidate calls a driver's missing cache_invalidate_user operation without first requiring that callback, transferring control to address zero. Reachability requires local access to an iommufd nesting context backed by a driver without that operation; existing upstream nesting drivers implement it.

The record

CVE
CVE-2024-46824
Published
Sep 27, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 27, 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=8c6eabae3807e048b9f17733af5e20500fbf858c <89827a4de802765b1ebb401fc1e73a90108c7520
  3. Affected versionversion=8c6eabae3807e048b9f17733af5e20500fbf858c <a11dda723c6493bb1853bbc61c093377f96e2d47

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.8; version=8c6eabae3807e048b9f17733af5e20500fbf858c <89827a4de802765b1ebb401fc1e73a90108c7520; version=8c6eabae3807e048b9f17733af5e20500fbf858c <a11dda723c6493bb1853bbc61c093377f96e2d47

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

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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