CVE-2024-46814

Kernel memory corruption via invalid HDCP index

Published Sep 27, 2024 · Updated May 11, 2026

Improper array-index validation in affected Linux kernels allows local users to trigger memory overruns during AMD display HDCP handling. In hdcp_msg.c, hdmi_14_process_transaction and dp_11_process_transaction accept HDCP_MESSAGE_ID_INVALID (-1), and the HDMI path uses it to index hdcp_i2c_offsets before validation. Low-privileged local access and an AMD display using the affected HDCP paths are required; the overrun can disrupt the kernel and can corrupt or expose kernel memory.

CVSS severity7.8
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

Improper array-index validation in affected Linux kernels allows local users to trigger memory overruns during AMD display HDCP handling. In hdcp_msg.c, hdmi_14_process_transaction and dp_11_process_transaction accept HDCP_MESSAGE_ID_INVALID (-1), and the HDMI path uses it to index hdcp_i2c_offsets before validation. Low-privileged local access and an AMD display using the affected HDCP paths are required; the overrun can disrupt the kernel and can corrupt or expose kernel memory.

The record

CVE
CVE-2024-46814
Published
Sep 27, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-129, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 27, 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=4c283fdac08abf3211533f70623c90a34f41d08d <0147505f08220c89b3a9c90eb608191276e263a8
  2. Affected versionversion=4c283fdac08abf3211533f70623c90a34f41d08d <6590643c5de74098d27933b7d224d5ac065d7755
  3. Affected versionversion=4c283fdac08abf3211533f70623c90a34f41d08d <916083054670060023d3f8a8ace895d710e268f4
  4. Affected versionversion=4c283fdac08abf3211533f70623c90a34f41d08d <cb63090a17d3abb87f132851fa3711281249b7d2
  5. Affected versionversion=4c283fdac08abf3211533f70623c90a34f41d08d <fa71face755e27dc44bc296416ebdf2c67163316
  6. Affected versionversion=4c283fdac08abf3211533f70623c90a34f41d08d <fe63daf7b10253b0faaa60c55d6153cd276927aa
  7. Affected versionversion=5.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4c283fdac08abf3211533f70623c90a34f41d08d <0147505f08220c89b3a9c90eb608191276e263a8; version=4c283fdac08abf3211533f70623c90a34f41d08d <6590643c5de74098d27933b7d224d5ac065d7755; version=4c283fdac08abf3211533f70623c90a34f41d08d <916083054670060023d3f8a8ace895d710e268f4; version=4c283fdac08abf3211533f70623c90a34f41d08d <cb63090a17d3abb87f132851fa3711281249b7d2; version=4c283fdac08abf3211533f70623c90a34f41d08d <fa71face755e27dc44bc296416ebdf2c67163316; version=4c283fdac08abf3211533f70623c90a34f41d08d <fe63daf7b10253b0faaa60c55d6153cd276927aa; version=5.5

Published CVSS scores

7.8SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5Oracle LinuxCVSS: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

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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
T1068Exploitation for Privilege Escalation

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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