CVE-2024-47662

Z8 entry blockage via forbidden diagnostic register read

Published Oct 9, 2024 · Updated May 11, 2026

Improper register access in Linux 5.6 through 6.10.8 allows local users to block Z8 entry during DCN35 diagnostic collection. When DMCUB work times out, dmub_dcn35.c diagnostics read a forbidden register, triggering a security violation that prevents the display block from entering Z8. Low-privilege local access and the DCN35 DMCUB timeout path are required; the published record reports no data exposure or modification.

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 register access in Linux 5.6 through 6.10.8 allows local users to block Z8 entry during DCN35 diagnostic collection. When DMCUB work times out, dmub_dcn35.c diagnostics read a forbidden register, triggering a security violation that prevents the display block from entering Z8. Low-privilege local access and the DCN35 DMCUB timeout path are required; the published record reports no data exposure or modification.

The record

CVE
CVE-2024-47662
Published
Oct 9, 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. Oct 9, 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=5.6
  2. Affected versionversion=7c008829cdc13012ce705ebd46c81a7ca5aeff8b <466423c6dd8af23ebb3a69d43434d01aed0db356
  3. Affected versionversion=7c008829cdc13012ce705ebd46c81a7ca5aeff8b <eba4b2a38ccdf074a053834509545703d6df1d57

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.6; version=7c008829cdc13012ce705ebd46c81a7ca5aeff8b <466423c6dd8af23ebb3a69d43434d01aed0db356; version=7c008829cdc13012ce705ebd46c81a7ca5aeff8b <eba4b2a38ccdf074a053834509545703d6df1d57

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.

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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

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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