CVE-2025-38155

Kernel crash via unchecked MMIO mapping failure

Published Jul 3, 2025 · Updated May 11, 2026

A null pointer dereference in the Linux kernel mt7915 Wi-Fi driver allows local users to crash the kernel during WED initialization. mt7915_mmio_wed_init() uses the mapping returned by devm_ioremap() without checking for NULL when MMIO mapping fails. The flaw is reachable only when the mt7915 driver initializes its WED path, and the reported consequence is availability loss rather than data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A null pointer dereference in the Linux kernel mt7915 Wi-Fi driver allows local users to crash the kernel during WED initialization. mt7915_mmio_wed_init() uses the mapping returned by devm_ioremap() without checking for NULL when MMIO mapping fails. The flaw is reachable only when the mt7915 driver initializes its WED path, and the reported consequence is availability loss rather than data disclosure or modification.

The record

CVE
CVE-2025-38155
Published
Jul 3, 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. Jul 3, 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=4f831d18d12da80cec0bebe5b8ca8702a528195a <790d05cde359356feea8915094a51166af1629f5
  2. Affected versionversion=4f831d18d12da80cec0bebe5b8ca8702a528195a <d825ed9fd768be10d52beba6f57a4b50c0c154aa
  3. Affected versionversion=4f831d18d12da80cec0bebe5b8ca8702a528195a <e9f9cef1877ac32285dbc1f31b86c8955b712fc2
  4. Affected versionversion=4f831d18d12da80cec0bebe5b8ca8702a528195a <efb95439c1477bbc955cacd0179c35e7861b437c
  5. Affected versionversion=6.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4f831d18d12da80cec0bebe5b8ca8702a528195a <790d05cde359356feea8915094a51166af1629f5; version=4f831d18d12da80cec0bebe5b8ca8702a528195a <d825ed9fd768be10d52beba6f57a4b50c0c154aa; version=4f831d18d12da80cec0bebe5b8ca8702a528195a <e9f9cef1877ac32285dbc1f31b86c8955b712fc2; version=4f831d18d12da80cec0bebe5b8ca8702a528195a <efb95439c1477bbc955cacd0179c35e7861b437c; version=6.2

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
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

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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