CVE-2022-50453

Local kernel crash via GPIO hot-unplug race

Published Oct 1, 2025 · Updated Oct 1, 2025

NULL-pointer dereferences in affected Linux kernel GPIO character-device code allow local users to crash the kernel after hot-unplug. The v1 and v2 ioctl(), read(), and poll() paths continue using an anonymous line-request file descriptor after its GPIO device is unbound and dereference a cleared gdev->chip pointer. A local user must request GPIO lines, retain the descriptor, cause a hot-pluggable device to be removed, and invoke one of those operations; successful exploitation interrupts the host by crashing its kernel.

CVSS severityUnavailable
Unscored
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL-pointer dereferences in affected Linux kernel GPIO character-device code allow local users to crash the kernel after hot-unplug. The v1 and v2 ioctl(), read(), and poll() paths continue using an anonymous line-request file descriptor after its GPIO device is unbound and dereference a cleared gdev->chip pointer. A local user must request GPIO lines, retain the descriptor, cause a hot-pluggable device to be removed, and invoke one of those operations; successful exploitation interrupts the host by crashing its kernel.

The record

CVE
CVE-2022-50453
Published
Oct 1, 2025
Updated
Oct 1, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 2025Record 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=4.8
  2. Affected versionversion=d7c51b47ac11e66f547b55640405c1c474642d72 <533aae7c94dbc2b14301cfd68ae7e0e90f0c8438
  3. Affected versionversion=d7c51b47ac11e66f547b55640405c1c474642d72 <6d79546622baab843172b52c3af035f83c1b21df
  4. Affected versionversion=d7c51b47ac11e66f547b55640405c1c474642d72 <7c755a2d6df511eeb5afba966ac28140f9ea5063
  5. Affected versionversion=d7c51b47ac11e66f547b55640405c1c474642d72 <ac6ce3cd7a3e10a2e37b8970bab81b4d33d5cfc3
  6. Affected versionversion=d7c51b47ac11e66f547b55640405c1c474642d72 <d66f68ac9e7ba46b6b90fbe25155723f2126088a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.8; version=d7c51b47ac11e66f547b55640405c1c474642d72 <533aae7c94dbc2b14301cfd68ae7e0e90f0c8438; version=d7c51b47ac11e66f547b55640405c1c474642d72 <6d79546622baab843172b52c3af035f83c1b21df; version=d7c51b47ac11e66f547b55640405c1c474642d72 <7c755a2d6df511eeb5afba966ac28140f9ea5063; version=d7c51b47ac11e66f547b55640405c1c474642d72 <ac6ce3cd7a3e10a2e37b8970bab81b4d33d5cfc3; version=d7c51b47ac11e66f547b55640405c1c474642d72 <d66f68ac9e7ba46b6b90fbe25155723f2126088a

Published CVSS scores

No CVSS assessment is available in this record.

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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

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Your stack

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