CVE-2024-21478

Transient denial of service via fence type confusion

Published Jun 3, 2024 · Updated Aug 1, 2024

Type confusion in Qualcomm Snapdragon Auto graphics firmware allows local users to cause a transient service interruption during DMA. When KGSL sets a fence callback to free a memory-entry object, an incorrect type conversion confuses the object type and permits the callback to act on the wrong object. Exploitation requires local access to the graphics path; the documented consequence is transient denial of service, with no confidentiality or integrity impact.

CVSS severity6.2
Medium
EPSS probability0.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Type confusion in Qualcomm Snapdragon Auto graphics firmware allows local users to cause a transient service interruption during DMA. When KGSL sets a fence callback to free a memory-entry object, an incorrect type conversion confuses the object type and permits the callback to act on the wrong object. Exploitation requires local access to the graphics path; the documented consequence is transient denial of service, with no confidentiality or integrity impact.

The record

CVE
CVE-2024-21478
Published
Jun 3, 2024
Updated
Aug 1, 2024
Vendor
Qualcomm
Product
SA9000P Firmware
Classifications
CWE-476, CWE-704, T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2024Record 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=*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Qualcomm · SA9000P Firmwareversion=*
Qualcomm · QAM8255P Firmwareversion=*
Qualcomm · SA8770P Firmwareversion=*
Qualcomm · QAMSRV1M Firmwareversion=*
Qualcomm · SRV1M Firmwareversion=*
Qualcomm · QAM8650P Firmwareversion=*
Qualcomm · SA8775P Firmwareversion=*
Qualcomm · Snapdragonversion=QAM8255P; version=QAM8650P; version=QAM8775P; version=QAMSRV1H; version=QAMSRV1M; version=SA8255P; version=SA8650P; version=SA8770P; version=SA8775P; version=SA9000P; version=SRV1H; version=SRV1M
Qualcomm · SA8255P Firmwareversion=*
Qualcomm · QAMSRV1H Firmwareversion=*
Qualcomm · QAM8775P Firmwareversion=*
Qualcomm · SA8650P Firmwareversion=*
Qualcomm · SRV1H Firmwareversion=*

Published CVSS scores

6.2Qualcomm, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
CWE-704Incorrect Type Conversion or Cast
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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