CVE-2021-47380

Local system crash via premature removal callback

Published May 21, 2024 · Updated Aug 5, 2026

NULL pointer dereference in the Linux kernel 5.11 through 5.14.9 allows local users to crash the system during AMD SFH device registration. In amd_mp2_pci_probe, devm_add_action_or_reset can invoke amd_mp2_pci_remove before the PCI driver data and dependent state are initialized. Reachability requires low-privilege local access and a Ryzen-based platform with an AMD Sensor Fusion Hub; the bounded consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.22%
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 the Linux kernel 5.11 through 5.14.9 allows local users to crash the system during AMD SFH device registration. In amd_mp2_pci_probe, devm_add_action_or_reset can invoke amd_mp2_pci_remove before the PCI driver data and dependent state are initialized. Reachability requires low-privilege local access and a Ryzen-based platform with an AMD Sensor Fusion Hub; the bounded consequence is a kernel crash.

The record

CVE
CVE-2021-47380
Published
May 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=4f567b9f8141a86c7d878fadf136e5d1408e3e61 <283e4bee701dfcd409dd293f19a268bb2bc8ff38
  2. Affected versionversion=4f567b9f8141a86c7d878fadf136e5d1408e3e61 <d46ef750ed58cbeeba2d9a55c99231c30a172764
  3. Affected versionversion=5.11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4f567b9f8141a86c7d878fadf136e5d1408e3e61 <283e4bee701dfcd409dd293f19a268bb2bc8ff38; version=4f567b9f8141a86c7d878fadf136e5d1408e3e61 <d46ef750ed58cbeeba2d9a55c99231c30a172764; version=5.11

Published CVSS scores

5.5SUSECVSS: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.

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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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