CVE-2022-48766

Kernel panic via unbracketed FPU calculations

Published Jun 20, 2024 · Updated May 11, 2026

Improper FPU use in the AMD DCN 3.01 display path in Linux 5.11 through 5.16.4 allows local users to trigger a kernel panic. The dcn301_calculate_wm_and_dlg path invokes floating-point work without DC_FP_START and DC_FP_END bracketing, leaving kernel FPU state unmanaged. Reachability requires an affected AMD display path to perform watermark and display-logic calculations; the reported consequence is repeated warnings or a kernel panic, not data access.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper FPU use in the AMD DCN 3.01 display path in Linux 5.11 through 5.16.4 allows local users to trigger a kernel panic. The dcn301_calculate_wm_and_dlg path invokes floating-point work without DC_FP_START and DC_FP_END bracketing, leaving kernel FPU state unmanaged. Reachability requires an affected AMD display path to perform watermark and display-logic calculations; the reported consequence is repeated warnings or a kernel panic, not data access.

The record

CVE
CVE-2022-48766
Published
Jun 20, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 20, 2024CVE 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

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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=3a83e4e64bb1522ddac67ffc787d1c38291e1a65 <25f1488bdbba63415239ff301fe61a8546140d9f
  2. Affected versionversion=3a83e4e64bb1522ddac67ffc787d1c38291e1a65 <456ba2433844a6483cc4c933aa8f43d24575e341
  3. Affected versionversion=5.11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3a83e4e64bb1522ddac67ffc787d1c38291e1a65 <25f1488bdbba63415239ff301fe61a8546140d9f; version=3a83e4e64bb1522ddac67ffc787d1c38291e1a65 <456ba2433844a6483cc4c933aa8f43d24575e341; version=5.11

Published CVSS scores

5.5NIST NVDCVSS: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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