CVE-2023-6143

Local stale-memory access via GPU memory race

Published Mar 4, 2024 · Updated Aug 28, 2024

Use-after-free in Arm Mali GPU kernel drivers allows local users to trigger stale memory access through a software race condition. Under heavy system load, attacker-prepared memory and concurrent GPU memory-processing operations leave a stale reference after memory release. A local non-privileged account and an affected Mali GPU are required; Arm has not published the affected function or a more specific consequence.

CVSS severity8.4
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Arm Mali GPU kernel drivers allows local users to trigger stale memory access through a software race condition. Under heavy system load, attacker-prepared memory and concurrent GPU memory-processing operations leave a stale reference after memory release. A local non-privileged account and an affected Mali GPU are required; Arm has not published the affected function or a more specific consequence.

The record

CVE
CVE-2023-6143
Published
Mar 4, 2024
Updated
Aug 28, 2024
Vendor
Arm
Product
Valhall GPU Kernel Driver
Classifications
CWE-416
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 4, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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=r37p0 <=r46p0
  2. Affected versionversion=r37p0 <=r46p0 changes=[{"at":"r47p0","status":"unaffected"}]

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Arm · Valhall GPU Kernel Driverversion=r37p0 <=r46p0; version=r37p0 <=r46p0 changes=[{"at":"r47p0","status":"unaffected"}]
Arm · Midgard GPU Kernel Driverversion=r13p0 <=r32p0
Arm · Bifrost GPU Kernel Driverversion=r1p0 <=r18p0; version=r1p0 <=r18p0 changes=[{"at":"r19p0","status":"unaffected"}]
Arm · Arm 5th Gen GPU Architecture Kernel Driverversion=r41p0 <=r46p0; version=r41p0 <=r46p0 changes=[{"at":"r47p0","status":"unaffected"}]

Published CVSS scores

8.4CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/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-416Use After Free

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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