CVE-2024-46776

System crash via unchecked link encoder pointer

Published Sep 18, 2024 · Updated May 11, 2026

NULL pointer dereference in Linux kernel AMD display code allows local users to crash affected systems during physical-link creation. The construct_phy function calls DC_LOG_DC to read link_enc feature flags before checking whether link_enc_create returned NULL. Reachability requires the AMD display driver and a failed link-encoder creation path; the documented consequence is availability loss, with no confidentiality or integrity impact.

CVSS severity5.5
Medium
EPSS probability0.24%
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 Linux kernel AMD display code allows local users to crash affected systems during physical-link creation. The construct_phy function calls DC_LOG_DC to read link_enc feature flags before checking whether link_enc_create returned NULL. Reachability requires the AMD display driver and a failed link-encoder creation path; the documented consequence is availability loss, with no confidentiality or integrity impact.

The record

CVE
CVE-2024-46776
Published
Sep 18, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 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=4.15
  2. Affected versionversion=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <3a82f62b0d9d7687eac47603bb6cd14a50fa718b
  3. Affected versionversion=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <874e3bb302f97b94ac548959ec4f925b8e7b45e2
  4. Affected versionversion=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <adc74d25cdbba978afbb57caec23bbcd0329f7b8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.15; version=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <3a82f62b0d9d7687eac47603bb6cd14a50fa718b; version=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <874e3bb302f97b94ac548959ec4f925b8e7b45e2; version=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <adc74d25cdbba978afbb57caec23bbcd0329f7b8

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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
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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