CVE-2024-42117

Kernel memory overrun via invalid display index

Published Jul 30, 2024 · Updated Aug 5, 2026

Improper array-index validation in the Linux kernel 6.7 through 6.9.8 allows local users to overrun memory through AMD display state changes. The AMD display code's find_disp_cfg_idx_by_plane_id and find_disp_cfg_idx_by_stream_id helpers return -1 when a plane or stream identifier is absent, and callers use that invalid value as an array index. The path requires local low-privileged access and AMD display handling; published sources do not describe a demonstrated exploit outcome beyond the reported overruns and negative returns.

CVSS severity7.8
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper array-index validation in the Linux kernel 6.7 through 6.9.8 allows local users to overrun memory through AMD display state changes. The AMD display code's find_disp_cfg_idx_by_plane_id and find_disp_cfg_idx_by_stream_id helpers return -1 when a plane or stream identifier is absent, and callers use that invalid value as an array index. The path requires local low-privileged access and AMD display handling; published sources do not describe a demonstrated exploit outcome beyond the reported overruns and negative returns.

The record

CVE
CVE-2024-42117
Published
Jul 30, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-129
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 30, 2024CVE 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=6.7
  2. Affected versionversion=7966f319c66d9468623c6a6a017ecbc0dd79be75 <01eb50e53c1ce505bf449348d433181310288765
  3. Affected versionversion=7966f319c66d9468623c6a6a017ecbc0dd79be75 <a9c047a5cf3135b8b66bd28fbe2c698b9cace0b3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.7; version=7966f319c66d9468623c6a6a017ecbc0dd79be75 <01eb50e53c1ce505bf449348d433181310288765; version=7966f319c66d9468623c6a6a017ecbc0dd79be75 <a9c047a5cf3135b8b66bd28fbe2c698b9cace0b3

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8CanonicalCVSS: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

CWE-129Improper Validation of Array Index

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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