CVE-2023-52485

Local system hang via unpowered DMCUB command

Published Feb 29, 2024 · Updated Aug 15, 2026

Denial of service in the Linux kernel's AMD display driver allows local users to hang the system through DMCUB command submission. Direct calls to dm_execute_dmub_cmd and dm_execute_dmub_cmd_list submit commands without first leaving idle power optimization, so an unpowered DMCUB stalls processing. A low-privileged local user must reach the affected AMD display path; successful exploitation interrupts availability without reported data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux kernel's AMD display driver allows local users to hang the system through DMCUB command submission. Direct calls to dm_execute_dmub_cmd and dm_execute_dmub_cmd_list submit commands without first leaving idle power optimization, so an unpowered DMCUB stalls processing. A low-privileged local user must reach the affected AMD display path; successful exploitation interrupts availability without reported data disclosure or modification.

The record

CVE
CVE-2023-52485
Published
Feb 29, 2024
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 29, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=65138eb72e1fc687be49932b9a45325598ffa01c <303197775a97416b62d4da69280d0c120a20e009
  2. Affected versionversion=65138eb72e1fc687be49932b9a45325598ffa01c <8892780834ae294bc3697c7d0e056d7743900b39
  3. Affected versionversion=6.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=65138eb72e1fc687be49932b9a45325598ffa01c <303197775a97416b62d4da69280d0c120a20e009; version=65138eb72e1fc687be49932b9a45325598ffa01c <8892780834ae294bc3697c7d0e056d7743900b39; version=6.7

Published CVSS scores

5.5NVDCVSS: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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