CVE-2023-4211Known exploitationPublic exploit

Kernel memory access via tracking-page use-after-free

Published Oct 1, 2023 · Updated Oct 21, 2025

Use-after-free in affected Arm Mali GPU kernel drivers allows local users to access freed kernel memory through crafted GPU operations. A split tracking-page VMA lets concurrent teardown paths replace and free kctx->process_mm before kbasep_os_process_page_usage_drain updates its counters. A local non-privileged process with access to /dev/mali0 must win the teardown race; the published impact is limited to confidentiality.

CVSS severity5.5
Medium
EPSS probability1.10%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Use-after-free in affected Arm Mali GPU kernel drivers allows local users to access freed kernel memory through crafted GPU operations. A split tracking-page VMA lets concurrent teardown paths replace and free kctx->process_mm before kbasep_os_process_page_usage_drain updates its counters. A local non-privileged process with access to /dev/mali0 must win the teardown race; the published impact is limited to confidentiality.

The record

CVE
CVE-2023-4211
Published
Oct 1, 2023
Updated
Oct 21, 2025
Vendor
Arm
Product
Valhall GPU Kernel Driver
Classifications
CWE-416, CAPEC-233, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=r19p0 <=r42p0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Arm · Valhall GPU Kernel Driverversion=r19p0 <=r42p0
Arm · Midgard GPU Kernel Driverversion=r12p0 <=r32p0
Arm · Bifrost GPU Kernel Driverversion=r0p0 <=r42p0
Arm · Arm 5th Gen GPU Architecture Kernel Driverversion=r41p0 <=r42p0

Published CVSS scores

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 exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
CAPEC-233Privilege Escalation
T1068Exploitation for Privilege Escalation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo