CVE-2024-39473

Kernel crash via unchecked base-extension pointer

Published Jul 5, 2024 · Updated May 11, 2026

NULL pointer dereference in Linux 6.4 and later affected builds allows local users to crash the kernel via a crafted SOF topology. In sound/soc/sof/ipc4-topology.c, the input-format lookup dereferences process->base_config_ext when a process module has no base configuration extension, although the base format applies to every input. Exploitation requires local low-privilege access and a specifically crafted Sound Open Firmware IPC4 topology and sequence; the bounded impact is a kernel crash.

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 6.4 and later affected builds allows local users to crash the kernel via a crafted SOF topology. In sound/soc/sof/ipc4-topology.c, the input-format lookup dereferences process->base_config_ext when a process module has no base configuration extension, although the base format applies to every input. Exploitation requires local low-privilege access and a specifically crafted Sound Open Firmware IPC4 topology and sequence; the bounded impact is a kernel crash.

The record

CVE
CVE-2024-39473
Published
Jul 5, 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. Jul 5, 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=6.4
  2. Affected versionversion=648fea12847695d60ddeebea86597114885ee76e <9e16f17a2a0e97b43538b272e7071537a3e03368
  3. Affected versionversion=648fea12847695d60ddeebea86597114885ee76e <e3ae00ee238bce6cfa5ad935c921181c14d18fd6
  4. Affected versionversion=648fea12847695d60ddeebea86597114885ee76e <ffa077b2f6ad124ec3d23fbddc5e4b0ff2647af8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.4; version=648fea12847695d60ddeebea86597114885ee76e <9e16f17a2a0e97b43538b272e7071537a3e03368; version=648fea12847695d60ddeebea86597114885ee76e <e3ae00ee238bce6cfa5ad935c921181c14d18fd6; version=648fea12847695d60ddeebea86597114885ee76e <ffa077b2f6ad124ec3d23fbddc5e4b0ff2647af8

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

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 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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