CVE-2023-53806

System restart via SubVP command array overrun

Published Dec 9, 2025 · Updated Aug 5, 2026

Out-of-bounds write in the Linux kernel AMD display driver allows local users to restart the system through display modesetting. In dcn32_commit_subvp_config(), pipe splitting drives cmd_pipe_index past the two-entry SubVP command array because both vblank pipes are populated instead of only the top pipe. Access to DRM modeset ioctls on /dev/dri/card0, DRM master, an AMD display path, and a high-resolution multi-display topology are required; the fixed-offset kernel write triggers a page fault and system restart.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in the Linux kernel AMD display driver allows local users to restart the system through display modesetting. In dcn32_commit_subvp_config(), pipe splitting drives cmd_pipe_index past the two-entry SubVP command array because both vblank pipes are populated instead of only the top pipe. Access to DRM modeset ioctls on /dev/dri/card0, DRM master, an AMD display path, and a high-resolution multi-display topology are required; the fixed-offset kernel write triggers a page fault and system restart.

The record

CVE
CVE-2023-53806
Published
Dec 9, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=4.15
  2. Affected versionversion=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <375d192eb1f1d9229a6d994da7ba31f3582b106b
  3. Affected versionversion=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <92e6c79acad4b96efeff261d27bdbd8089a7dd24
  4. Affected versionversion=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <9bb10b7aaec3b6278f9cc410c17dcaa129bbbbf0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.15; version=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <375d192eb1f1d9229a6d994da7ba31f3582b106b; version=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <92e6c79acad4b96efeff261d27bdbd8089a7dd24; version=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <9bb10b7aaec3b6278f9cc410c17dcaa129bbbbf0

Published CVSS scores

7.8LinuxCVSS: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.

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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

T1499.004Endpoint Denial of Service: Application 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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