CVE-2022-49756

System crash via unchecked USB PHY resource

Published Mar 27, 2025 · Updated May 11, 2026

NULL pointer dereference in Linux kernel 6.1 through 6.1.8 allows local users to crash the system during Sunplus USB PHY probing. sp_usb_phy_probe() passes moon4_res_mem->start to devm_ioremap() without checking whether platform_get_resource_byname() returned NULL. Reaching the crash requires local access and a Sunplus USB PHY configuration in which the named moon4 memory resource is absent.

CVSS severity5.5
Medium
EPSS probability0.17%
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 Linux kernel 6.1 through 6.1.8 allows local users to crash the system during Sunplus USB PHY probing. sp_usb_phy_probe() passes moon4_res_mem->start to devm_ioremap() without checking whether platform_get_resource_byname() returned NULL. Reaching the crash requires local access and a Sunplus USB PHY configuration in which the named moon4 memory resource is absent.

The record

CVE
CVE-2022-49756
Published
Mar 27, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 27, 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=6.1
  2. Affected versionversion=99d9ccd97385208b78b3d88e756451f4b70119fc <17eee264ef386ef30a69dd70e36f29893b85c170
  3. Affected versionversion=99d9ccd97385208b78b3d88e756451f4b70119fc <d838b5c99bcecd593b4710a93fce8fdbf122395b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.1; version=99d9ccd97385208b78b3d88e756451f4b70119fc <17eee264ef386ef30a69dd70e36f29893b85c170; version=99d9ccd97385208b78b3d88e756451f4b70119fc <d838b5c99bcecd593b4710a93fce8fdbf122395b

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CISA-ADPCVSS: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

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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
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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