CVE-2023-4272

Local data disclosure via reused freed memory

Published Nov 7, 2023 · Updated Sep 4, 2024

Improper memory processing in Arm Mali GPU Kernel Drivers allows local users to read sensitive data from previously freed GPU memory. Arm identifies GPU processing operations that expose freed memory but does not publish the affected function, allocation path, or precise reuse error. Access requires a local non-privileged account able to submit GPU work; the bounded consequence is disclosure of residual memory contents.

CVSS severity5.5
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper memory processing in Arm Mali GPU Kernel Drivers allows local users to read sensitive data from previously freed GPU memory. Arm identifies GPU processing operations that expose freed memory but does not publish the affected function, allocation path, or precise reuse error. Access requires a local non-privileged account able to submit GPU work; the bounded consequence is disclosure of residual memory contents.

The record

CVE
CVE-2023-4272
Published
Nov 7, 2023
Updated
Sep 4, 2024
Vendor
Arm
Product
Valhall GPU Kernel Driver
Classifications
CWE-200, CWE-1251, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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=r19p0 <r42p0 changes=[{"at":"r42p0","status":"unaffected"}]

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Arm · Valhall GPU Kernel Driverversion=r19p0 <r42p0 changes=[{"at":"r42p0","status":"unaffected"}]
Arm · Midgard GPU Kernel Driverversion=r8p0 <=r32p0
Arm · Bifrost GPU Kernel Driverversion=r0p0 <r42p0 changes=[{"at":"r42p0","status":"unaffected"}]
Arm · Arm 5th Gen GPU Architecture Kernel Driverversion=r41p0 <r42p0 changes=[{"at":"r42p0","status":"unaffected"}]

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-1251Mirrored Regions with Different Values
T1005Data from Local System

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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