CVE-2025-38381

Local kernel crash via unchecked haptic allocation

Published Jul 25, 2025 · Updated May 11, 2026

NULL pointer dereference in the Linux CS40L50 haptic driver allows local users to crash the kernel during OWT effect upload. The cs40l50_upload_owt() function passes an unchecked kmalloc() result to memcpy(), so allocation failure makes the copy dereference a NULL destination. Reachability requires the CS40L50 haptic driver and an OWT effect upload while the GFP_KERNEL allocation fails; the reported consequence is availability loss.

CVSS severity5.5
Medium
EPSS probability0.15%
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 CS40L50 haptic driver allows local users to crash the kernel during OWT effect upload. The cs40l50_upload_owt() function passes an unchecked kmalloc() result to memcpy(), so allocation failure makes the copy dereference a NULL destination. Reachability requires the CS40L50 haptic driver and an OWT effect upload while the GFP_KERNEL allocation fails; the reported consequence is availability loss.

The record

CVE
CVE-2025-38381
Published
Jul 25, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 25, 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=6.11
  2. Affected versionversion=c38fe1bb5d21c2ce0857965ee06174ee587d6b42 <4cf65845fdd09d711fc7546d60c9abe010956922
  3. Affected versionversion=c38fe1bb5d21c2ce0857965ee06174ee587d6b42 <e87fc697fa4be5164e47cfba4ddd4732499adc60
  4. Affected versionversion=c38fe1bb5d21c2ce0857965ee06174ee587d6b42 <ea20568895c1122f15b6fc9e8d02c6cbe22964f8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.11; version=c38fe1bb5d21c2ce0857965ee06174ee587d6b42 <4cf65845fdd09d711fc7546d60c9abe010956922; version=c38fe1bb5d21c2ce0857965ee06174ee587d6b42 <e87fc697fa4be5164e47cfba4ddd4732499adc60; version=c38fe1bb5d21c2ce0857965ee06174ee587d6b42 <ea20568895c1122f15b6fc9e8d02c6cbe22964f8

Published CVSS scores

5.5NIST NVDCVSS: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
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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