CVE-2023-5427Public exploit

Local memory access via GPU use-after-free

Published Dec 1, 2023 · Updated Feb 25, 2026

Use-after-free in Arm GPU kernel drivers r44p0 through r45p0 allows local users to access already freed memory via GPU processing operations. The advisory does not identify a function or code path; it describes improper GPU processing that dereferences memory after it has been freed. A local non-privileged account with access to the GPU device is required, and the flaw exposes freed memory with potential integrity or availability impact.

CVSS severity7.8
High
EPSS probability0.33%
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 GPU kernel drivers r44p0 through r45p0 allows local users to access already freed memory via GPU processing operations. The advisory does not identify a function or code path; it describes improper GPU processing that dereferences memory after it has been freed. A local non-privileged account with access to the GPU device is required, and the flaw exposes freed memory with potential integrity or availability impact.

The record

CVE
CVE-2023-5427
Published
Dec 1, 2023
Updated
Feb 25, 2026
Vendor
Arm
Product
Valhall GPU Kernel Driver
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 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=r44p0 <=r45p0 changes=[{"at":"r46p0","status":"unaffected"}]

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Arm · Valhall GPU Kernel Driverversion=r44p0 <=r45p0 changes=[{"at":"r46p0","status":"unaffected"}]
Arm · Bifrost GPU Kernel Driverversion=r44p0 <=r45p0 changes=[{"at":"r46p0","status":"unaffected"}]
Arm · Arm 5th Gen GPU Architecture Kernel Driverversion=r44p0 <=r45p0 changes=[{"at":"r46p0","status":"unaffected"}]

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

Public exploit references

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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