CVE-2023-53780

Display interruption via miscalculated FCLK watermark

Published Dec 9, 2025 · Updated May 11, 2026

Integer underflow in the AMD display driver in affected Linux kernels allows local privileged users to interrupt display service. The DCN 3.2 watermark calculation uses dummy UCLK p-state latency for the FCLK transition when UCLK p-state changes are unsupported, producing an undersized FCLK watermark. Exploitation requires high local privileges and affected AMD display hardware; the published impact is limited to availability.

CVSS severity1.9
Low
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer underflow in the AMD display driver in affected Linux kernels allows local privileged users to interrupt display service. The DCN 3.2 watermark calculation uses dummy UCLK p-state latency for the FCLK transition when UCLK p-state changes are unsupported, producing an undersized FCLK watermark. Exploitation requires high local privileges and affected AMD display hardware; the published impact is limited to availability.

The record

CVE
CVE-2023-53780
Published
Dec 9, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Dec 9, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record 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=4.15
  2. Affected versionversion=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <4bdfa48d74649898468a0bf5c8b8a48dded77b4a
  3. Affected versionversion=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <6853d56dba56d1c24db403ff3885c71e18d572c4
  4. Affected versionversion=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <972243f973eb0821084e5833d5f7f4ed025f42da

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=4.15; version=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <4bdfa48d74649898468a0bf5c8b8a48dded77b4a; version=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <6853d56dba56d1c24db403ff3885c71e18d572c4; version=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <972243f973eb0821084e5833d5f7f4ed025f42da

Published CVSS scores

1.9SUSECVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L

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
Privilegesadmin
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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