CVE-2024-50117

Local system crash via malformed ATIF response

Published Nov 5, 2024 · Updated Aug 5, 2026

NULL pointer dereference in affected Linux kernel releases allows local users to crash the system through malformed BIOS ATIF data. The AMDGPU amdgpu_atif_query_backlight_caps path fails to reject an invalid ATIF ACPI response before the caller dereferences its result. Reachability requires low-privileged local access and a system whose BIOS exposes the affected AMDGPU ATIF path and returns malformed data.

CVSS severity7.3
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in affected Linux kernel releases allows local users to crash the system through malformed BIOS ATIF data. The AMDGPU amdgpu_atif_query_backlight_caps path fails to reject an invalid ATIF ACPI response before the caller dereferences its result. Reachability requires low-privileged local access and a system whose BIOS exposes the affected AMDGPU ATIF path and returns malformed data.

The record

CVE
CVE-2024-50117
Published
Nov 5, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 5, 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=4.2
  2. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <1d7175f9c57b1abf9ecfbdfd53ea760761f52ffe
  3. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <234682910971732cd4da96fd95946e296e486b38
  4. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <43b4fa6e0e238c6e2662f4fb61d9f51c2785fb1d
  5. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <58556dcbd5606a5daccaee73b2130bc16b48e025
  6. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <6032287747f874b52dc8b9d7490e2799736e035f
  7. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <975ede2a7bec52b5da1428829b3439667c8a234b
  8. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <bf58f03931fdcf7b3c45cb76ac13244477a60f44
  9. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <cd67af3c1762de4c2483ae4dbdd98f9ea8fa56e3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.2; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <1d7175f9c57b1abf9ecfbdfd53ea760761f52ffe; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <234682910971732cd4da96fd95946e296e486b38; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <43b4fa6e0e238c6e2662f4fb61d9f51c2785fb1d; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <58556dcbd5606a5daccaee73b2130bc16b48e025; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <6032287747f874b52dc8b9d7490e2799736e035f; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <975ede2a7bec52b5da1428829b3439667c8a234b; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <bf58f03931fdcf7b3c45cb76ac13244477a60f44; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <cd67af3c1762de4c2483ae4dbdd98f9ea8fa56e3

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.3kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
5.5UbuntuCVSS: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

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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