CVE-2022-49509

Kernel crash via mismatched I2C client data

Published Feb 26, 2025 · Updated May 11, 2026

A pointer-type confusion in the max9286 driver in the Linux kernel allows local users to crash the kernel during module removal. max9286_init() replaces the I2C client data pointer with a v4l2_subdev pointer, but max9286_remove() later treats it as max9286_priv and passes an invalid mux pointer to i2c_mux_del_adapters(). Reaching the flaw requires local permission to remove the loaded max9286 module on a system using the affected driver; the demonstrated consequence is a kernel oops.

CVSS severity7.1
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A pointer-type confusion in the max9286 driver in the Linux kernel allows local users to crash the kernel during module removal. max9286_init() replaces the I2C client data pointer with a v4l2_subdev pointer, but max9286_remove() later treats it as max9286_priv and passes an invalid mux pointer to i2c_mux_del_adapters(). Reaching the flaw requires local permission to remove the loaded max9286 module on a system using the affected driver; the demonstrated consequence is a kernel oops.

The record

CVE
CVE-2022-49509
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-668, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 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=5.9
  2. Affected versionversion=66d8c9d2422da21ed41f75c03ba0685987b65fe0 <365ab7ebc24eebb42b9e020aeb440d51af8960cd
  3. Affected versionversion=66d8c9d2422da21ed41f75c03ba0685987b65fe0 <579c77595dbbdfe4f2edf335899f86ac51eca4e9
  4. Affected versionversion=66d8c9d2422da21ed41f75c03ba0685987b65fe0 <9dd783274c89c21a038d967b52a858a297e767f8
  5. Affected versionversion=66d8c9d2422da21ed41f75c03ba0685987b65fe0 <a4ec75df70575cdf33d9638c7844e729bfe6ce24

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.9; version=66d8c9d2422da21ed41f75c03ba0685987b65fe0 <365ab7ebc24eebb42b9e020aeb440d51af8960cd; version=66d8c9d2422da21ed41f75c03ba0685987b65fe0 <579c77595dbbdfe4f2edf335899f86ac51eca4e9; version=66d8c9d2422da21ed41f75c03ba0685987b65fe0 <9dd783274c89c21a038d967b52a858a297e767f8; version=66d8c9d2422da21ed41f75c03ba0685987b65fe0 <a4ec75df70575cdf33d9638c7844e729bfe6ce24

Published CVSS scores

7.1NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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-668Exposure of Resource to Wrong Sphere
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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