CVE-2022-49976

Kernel oops via duplicate touchscreen IRQ registration

Published Jun 18, 2025 · Updated May 11, 2026

Improper IRQ handling in Linux 5.17 through 5.19.7 allows local users to trigger a kernel oops on a Chuwi Hi8 with Windows BIOS. x86_acpi_irq_helper_get tries to register the already-present touchscreen, calls acpi_unregister_gsi, and tears down its working interrupt mapping. Reachability requires the tablet's Windows BIOS and x86-android-tablets initialization; the result is a kernel oops and loss of touchscreen operation.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper IRQ handling in Linux 5.17 through 5.19.7 allows local users to trigger a kernel oops on a Chuwi Hi8 with Windows BIOS. x86_acpi_irq_helper_get tries to register the already-present touchscreen, calls acpi_unregister_gsi, and tears down its working interrupt mapping. Reachability requires the tablet's Windows BIOS and x86-android-tablets initialization; the result is a kernel oops and loss of touchscreen operation.

The record

CVE
CVE-2022-49976
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 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=5.17
  2. Affected versionversion=84c2dcdd475f3f5d1d30c87404cafba4dd4b75ec <2986c51540ed50ac654ffb5a772e546c02628c91
  3. Affected versionversion=84c2dcdd475f3f5d1d30c87404cafba4dd4b75ec <c77b724cddfb8ac1291a60e3e68937e62cbfc5e0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.17; version=84c2dcdd475f3f5d1d30c87404cafba4dd4b75ec <2986c51540ed50ac654ffb5a772e546c02628c91; version=84c2dcdd475f3f5d1d30c87404cafba4dd4b75ec <c77b724cddfb8ac1291a60e3e68937e62cbfc5e0

Published CVSS scores

5.5NVDCVSS: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

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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