CVE-2025-38648

System crash via unchecked STM32 match data

Published Aug 22, 2025 · Updated May 11, 2026

NULL pointer dereference in the Linux kernel's STM32 SPI driver allows local users to crash affected systems during device probing. In stm32_spi_probe, of_device_get_match_data can return NULL, but the driver dereferences cfg->has_device_mode without first validating cfg. Local access and an STM32 platform-device configuration with unavailable match data are required; the reported consequence is a system crash.

CVSS severity5.5
Medium
EPSS probability0.16%
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 the Linux kernel's STM32 SPI driver allows local users to crash affected systems during device probing. In stm32_spi_probe, of_device_get_match_data can return NULL, but the driver dereferences cfg->has_device_mode without first validating cfg. Local access and an STM32 platform-device configuration with unavailable match data are required; the reported consequence is a system crash.

The record

CVE
CVE-2025-38648
Published
Aug 22, 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. Aug 22, 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=6.6
  2. Affected versionversion=fee681646fc831b154619ac0261afedcc7e671e7 <21f1c800f6620e43f31dfd76709dbac8ebaa5a16
  3. Affected versionversion=fee681646fc831b154619ac0261afedcc7e671e7 <3a571a8d52272cc26858ab1bc83d0f66e5dee938
  4. Affected versionversion=fee681646fc831b154619ac0261afedcc7e671e7 <6031a54f4eac921efe6122a561d44df89b37f2d4
  5. Affected versionversion=fee681646fc831b154619ac0261afedcc7e671e7 <a7645815edf4478f3258bb0db95a08986a77f5c0
  6. Affected versionversion=fee681646fc831b154619ac0261afedcc7e671e7 <cc063d23ad80ef7d201c41b2716b1bae7c662cf9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.6; version=fee681646fc831b154619ac0261afedcc7e671e7 <21f1c800f6620e43f31dfd76709dbac8ebaa5a16; version=fee681646fc831b154619ac0261afedcc7e671e7 <3a571a8d52272cc26858ab1bc83d0f66e5dee938; version=fee681646fc831b154619ac0261afedcc7e671e7 <6031a54f4eac921efe6122a561d44df89b37f2d4; version=fee681646fc831b154619ac0261afedcc7e671e7 <a7645815edf4478f3258bb0db95a08986a77f5c0; version=fee681646fc831b154619ac0261afedcc7e671e7 <cc063d23ad80ef7d201c41b2716b1bae7c662cf9

Published CVSS scores

5.5UbuntuCVSS: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
T1499.004Application 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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