CVE-2025-38195

Kernel panic via unchecked NULL PMD dereference

Published Jul 4, 2025 · Updated May 23, 2026

NULL-pointer dereference in Linux kernel LoongArch huge-page handling allows local users to cause a kernel panic through madvise. huge_pte_offset() dereferences a PMD returned during huge-page fault-in processing without first handling the valid NULL result. A local low-privileged account on a LoongArch system using the affected huge-page path is required, and the bounded consequence is a host crash.

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

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

NULL-pointer dereference in Linux kernel LoongArch huge-page handling allows local users to cause a kernel panic through madvise. huge_pte_offset() dereferences a PMD returned during huge-page fault-in processing without first handling the valid NULL result. A local low-privileged account on a LoongArch system using the affected huge-page path is required, and the bounded consequence is a host crash.

The record

CVE
CVE-2025-38195
Published
Jul 4, 2025
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 4, 2025CVE publishedPublication date reported by the CVE source.
  2. May 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2ca9380b12711afe95b3589bd82b59623b3c96b3 <b427d98d55217b53c88643579fbbd8a4c351a105
  2. Affected versionversion=34256805720993e37adf6127371a1265aea8376a
  3. Affected versionversion=51424fd171cee6a33f01f7c66b8eb23ac42289d4 <985f086f281b7bbb6644851e63af1a17ffff9277
  4. Affected versionversion=6.1.136 <6.2
  5. Affected versionversion=6.12.26 <6.12.35
  6. Affected versionversion=6.14.5 <6.15
  7. Affected versionversion=6.15
  8. Affected versionversion=6.6.89 <6.6.95
  9. Affected versionversion=b49f085cd671addbda4802d6b9382513f7dd0f30
  10. Affected versionversion=bd51834d1cf65a2c801295d230c220aeebf87a73 <b5c7397b7fd125203c60b59860c168ee92291272
  11. Affected versionversion=bd51834d1cf65a2c801295d230c220aeebf87a73 <ee084fa96123ede8b0563a1b5a9b23adc43cd50d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2ca9380b12711afe95b3589bd82b59623b3c96b3 <b427d98d55217b53c88643579fbbd8a4c351a105; version=34256805720993e37adf6127371a1265aea8376a; version=51424fd171cee6a33f01f7c66b8eb23ac42289d4 <985f086f281b7bbb6644851e63af1a17ffff9277; version=6.1.136 <6.2; version=6.12.26 <6.12.35; version=6.14.5 <6.15; version=6.15; version=6.6.89 <6.6.95; version=b49f085cd671addbda4802d6b9382513f7dd0f30; version=bd51834d1cf65a2c801295d230c220aeebf87a73 <b5c7397b7fd125203c60b59860c168ee92291272; version=bd51834d1cf65a2c801295d230c220aeebf87a73 <ee084fa96123ede8b0563a1b5a9b23adc43cd50d

Published CVSS scores

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo