CVE-2024-56778

Kernel crash via unchecked DRM error pointer

Published Jan 8, 2025 · Updated May 11, 2026

Improper exceptional-condition handling in affected Linux kernels allows local users to crash the kernel through the STI HQVDP DRM path. sti_hqvdp_atomic_check dereferences the crtc_state result from drm_atomic_get_crtc_state without first checking whether the call returned an error pointer. Reachability requires low-privileged local access and the affected STMicroelectronics HQVDP display-driver path; the published impact is limited to service interruption.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper exceptional-condition handling in affected Linux kernels allows local users to crash the kernel through the STI HQVDP DRM path. sti_hqvdp_atomic_check dereferences the crtc_state result from drm_atomic_get_crtc_state without first checking whether the call returned an error pointer. Reachability requires low-privileged local access and the affected STMicroelectronics HQVDP display-driver path; the published impact is limited to service interruption.

The record

CVE
CVE-2024-56778
Published
Jan 8, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-754, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 8, 2025CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.6
  2. Affected versionversion=dd86dc2f9ae1102f46115be1f1422265c15540f1 <31c857e7496d34e5a32a6f75bc024d0b06fd646a
  3. Affected versionversion=dd86dc2f9ae1102f46115be1f1422265c15540f1 <6b0d0d6e9d3c26697230bf7dc9e6b52bdb24086f
  4. Affected versionversion=dd86dc2f9ae1102f46115be1f1422265c15540f1 <82a5312f874fb18f045d9658e9bd290e3b0621c0
  5. Affected versionversion=dd86dc2f9ae1102f46115be1f1422265c15540f1 <837eb99ad3340c7a9febf454f41c8e3edb68ac1e
  6. Affected versionversion=dd86dc2f9ae1102f46115be1f1422265c15540f1 <c1ab40a1fdfee732c7e6ff2fb8253760293e47e8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.6; version=dd86dc2f9ae1102f46115be1f1422265c15540f1 <31c857e7496d34e5a32a6f75bc024d0b06fd646a; version=dd86dc2f9ae1102f46115be1f1422265c15540f1 <6b0d0d6e9d3c26697230bf7dc9e6b52bdb24086f; version=dd86dc2f9ae1102f46115be1f1422265c15540f1 <82a5312f874fb18f045d9658e9bd290e3b0621c0; version=dd86dc2f9ae1102f46115be1f1422265c15540f1 <837eb99ad3340c7a9febf454f41c8e3edb68ac1e; version=dd86dc2f9ae1102f46115be1f1422265c15540f1 <c1ab40a1fdfee732c7e6ff2fb8253760293e47e8

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

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-754Improper Check for Unusual or Exceptional Conditions
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo