CVE-2022-49945

Kernel crash via unchecked cooling-state array index

Published Jun 18, 2025 · Updated May 11, 2026

Out-of-bounds read in the Linux kernel gpio-fan driver from 4.1 allows local users to crash the kernel via an invalid cooling state. gpio_fan_set_cur_state() fails to reject states above fan_data->num_speeds, so set_fan_speed() uses an excessive value as an array index. Access requires a gpio-fan-backed thermal cooling device and permission to set its cur_state sysfs attribute; the resulting kernel oops interrupts the host.

CVSS severityUnavailable
Unscored
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

Out-of-bounds read in the Linux kernel gpio-fan driver from 4.1 allows local users to crash the kernel via an invalid cooling state. gpio_fan_set_cur_state() fails to reject states above fan_data->num_speeds, so set_fan_speed() uses an excessive value as an array index. Access requires a gpio-fan-backed thermal cooling device and permission to set its cur_state sysfs attribute; the resulting kernel oops interrupts the host.

The record

CVE
CVE-2022-49945
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1499
Attack vector
local
Privileges
Unavailable

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=4.1
  2. Affected versionversion=b5cf88e46badea6d600d8515edea23814e03444d <3263984c7acdcb0658155b05a724ed45a10de76d
  3. Affected versionversion=b5cf88e46badea6d600d8515edea23814e03444d <3ff866455e1e263a9ac1958095fd440984248e2f
  4. Affected versionversion=b5cf88e46badea6d600d8515edea23814e03444d <517dba798793e69b510779c3cde7224a65f3ed1d
  5. Affected versionversion=b5cf88e46badea6d600d8515edea23814e03444d <53196e0376205ed49b75bfd0475af5e0fbd20156
  6. Affected versionversion=b5cf88e46badea6d600d8515edea23814e03444d <7756eb1ed124753f4d64f761fc3d84290dffcb4d
  7. Affected versionversion=b5cf88e46badea6d600d8515edea23814e03444d <c8ae6a18708f260ccdeef6ba53af7548457dc26c
  8. Affected versionversion=b5cf88e46badea6d600d8515edea23814e03444d <e9f6972ab40a82bd7f6d36800792ba2e084474d8
  9. Affected versionversion=b5cf88e46badea6d600d8515edea23814e03444d <f233d2be38dbbb22299192292983037f01ab363c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.1; version=b5cf88e46badea6d600d8515edea23814e03444d <3263984c7acdcb0658155b05a724ed45a10de76d; version=b5cf88e46badea6d600d8515edea23814e03444d <3ff866455e1e263a9ac1958095fd440984248e2f; version=b5cf88e46badea6d600d8515edea23814e03444d <517dba798793e69b510779c3cde7224a65f3ed1d; version=b5cf88e46badea6d600d8515edea23814e03444d <53196e0376205ed49b75bfd0475af5e0fbd20156; version=b5cf88e46badea6d600d8515edea23814e03444d <7756eb1ed124753f4d64f761fc3d84290dffcb4d; version=b5cf88e46badea6d600d8515edea23814e03444d <c8ae6a18708f260ccdeef6ba53af7548457dc26c; version=b5cf88e46badea6d600d8515edea23814e03444d <e9f6972ab40a82bd7f6d36800792ba2e084474d8; version=b5cf88e46badea6d600d8515edea23814e03444d <f233d2be38dbbb22299192292983037f01ab363c

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

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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-125Out-of-bounds Read
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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