CVE-2024-56777

Local system crash via unchecked error pointer

Published Jan 8, 2025 · Updated May 11, 2026

Error-pointer dereference in the Linux kernel STI DRM driver allows local users to crash the system during an atomic display check. sti_gdp_atomic_check treats the ERR_PTR returned by drm_atomic_get_crtc_state as a valid crtc_state and dereferences it instead of checking IS_ERR. Reachability requires local low-privilege access, the STI DRM graphics path, and a failure from that state lookup; the bounded impact is a kernel crash.

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

What happened

Error-pointer dereference in the Linux kernel STI DRM driver allows local users to crash the system during an atomic display check. sti_gdp_atomic_check treats the ERR_PTR returned by drm_atomic_get_crtc_state as a valid crtc_state and dereferences it instead of checking IS_ERR. Reachability requires local low-privilege access, the STI DRM graphics path, and a failure from that state lookup; the bounded impact is a kernel crash.

The record

CVE
CVE-2024-56777
Published
Jan 8, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-754, T1499.004
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

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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=4.6
  2. Affected versionversion=dd86dc2f9ae1102f46115be1f1422265c15540f1 <3cf2e7c448e246f7e700c7aa47450d1e27579559
  3. Affected versionversion=dd86dc2f9ae1102f46115be1f1422265c15540f1 <997b64c3f4c1827c5cfda8ae7f5d13f78d28b541
  4. Affected versionversion=dd86dc2f9ae1102f46115be1f1422265c15540f1 <b79612ed6bc1a184c45427105c851b5b2d4342ca
  5. Affected versionversion=dd86dc2f9ae1102f46115be1f1422265c15540f1 <e965e771b069421c233d674c3c8cd8c7f7245f42
  6. Affected versionversion=dd86dc2f9ae1102f46115be1f1422265c15540f1 <f5804567cf9605d6e5ec46c0bb786f7d50f18c13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.6; version=dd86dc2f9ae1102f46115be1f1422265c15540f1 <3cf2e7c448e246f7e700c7aa47450d1e27579559; version=dd86dc2f9ae1102f46115be1f1422265c15540f1 <997b64c3f4c1827c5cfda8ae7f5d13f78d28b541; version=dd86dc2f9ae1102f46115be1f1422265c15540f1 <b79612ed6bc1a184c45427105c851b5b2d4342ca; version=dd86dc2f9ae1102f46115be1f1422265c15540f1 <e965e771b069421c233d674c3c8cd8c7f7245f42; version=dd86dc2f9ae1102f46115be1f1422265c15540f1 <f5804567cf9605d6e5ec46c0bb786f7d50f18c13

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CISA-ADPCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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
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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