CVE-2021-47445

Local system crash via premature eDP dereference

Published May 22, 2024 · Updated May 11, 2026

A NULL pointer dereference in Linux 4.0 through 5.15-rc1 allows local users to crash the system through the MSM eDP driver. In drivers/gpu/drm/msm/edp/edp_ctrl.c, initialization derives dev from edp->pdev->dev before checking whether edp is NULL. A low-privileged local user must reach the MSM embedded DisplayPort path; the bounded impact is a kernel crash without confidentiality or integrity loss.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A NULL pointer dereference in Linux 4.0 through 5.15-rc1 allows local users to crash the system through the MSM eDP driver. In drivers/gpu/drm/msm/edp/edp_ctrl.c, initialization derives dev from edp->pdev->dev before checking whether edp is NULL. A low-privileged local user must reach the MSM embedded DisplayPort path; the bounded impact is a kernel crash without confidentiality or integrity loss.

The record

CVE
CVE-2021-47445
Published
May 22, 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. May 22, 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=4.0
  2. Affected versionversion=ab5b0107ccf3821a6837b0f2819270d6fa0b278f <0cd063aa0a09822cc1620fc59a67fe2f9f6338ac
  3. Affected versionversion=ab5b0107ccf3821a6837b0f2819270d6fa0b278f <2133c4fc8e1348dcb752f267a143fe2254613b34
  4. Affected versionversion=ab5b0107ccf3821a6837b0f2819270d6fa0b278f <46c8ddede0273d1d132beefa9de8b820326982be
  5. Affected versionversion=ab5b0107ccf3821a6837b0f2819270d6fa0b278f <7f642b93710b6b1119bdff90be01e6b5a2a5d669
  6. Affected versionversion=ab5b0107ccf3821a6837b0f2819270d6fa0b278f <91a340768b012f5b910a203a805b97a345b3db37
  7. Affected versionversion=ab5b0107ccf3821a6837b0f2819270d6fa0b278f <bacac7d26849c8e903ceb7466d9ce8dc3c2797eb
  8. Affected versionversion=ab5b0107ccf3821a6837b0f2819270d6fa0b278f <f175b9a83e5c252d7c74acddc792840016caae0a
  9. Affected versionversion=ab5b0107ccf3821a6837b0f2819270d6fa0b278f <f302be08e3de94db8863a0b2958b2bb3e8e998e6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.0; version=ab5b0107ccf3821a6837b0f2819270d6fa0b278f <0cd063aa0a09822cc1620fc59a67fe2f9f6338ac; version=ab5b0107ccf3821a6837b0f2819270d6fa0b278f <2133c4fc8e1348dcb752f267a143fe2254613b34; version=ab5b0107ccf3821a6837b0f2819270d6fa0b278f <46c8ddede0273d1d132beefa9de8b820326982be; version=ab5b0107ccf3821a6837b0f2819270d6fa0b278f <7f642b93710b6b1119bdff90be01e6b5a2a5d669; version=ab5b0107ccf3821a6837b0f2819270d6fa0b278f <91a340768b012f5b910a203a805b97a345b3db37; version=ab5b0107ccf3821a6837b0f2819270d6fa0b278f <bacac7d26849c8e903ceb7466d9ce8dc3c2797eb; version=ab5b0107ccf3821a6837b0f2819270d6fa0b278f <f175b9a83e5c252d7c74acddc792840016caae0a; version=ab5b0107ccf3821a6837b0f2819270d6fa0b278f <f302be08e3de94db8863a0b2958b2bb3e8e998e6

Published CVSS scores

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.

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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
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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