CVE-2025-38712

Kernel crash via malformed HFS+ volume header

Published Sep 4, 2025 · Updated May 12, 2026

Improper input validation in the HFS+ driver in affected Linux kernels and SIMATIC CN 4100 before V5.0 allows local users to crash the kernel. hfsplus_fill_super() trusts inconsistent volume-header state and later causes hfsplus_create_attributes_file() to reach BUG_ON() instead of returning an I/O error. Local access and a malformed HFS+ volume are required; the assertion can interrupt the host or embedded appliance.

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

Improper input validation in the HFS+ driver in affected Linux kernels and SIMATIC CN 4100 before V5.0 allows local users to crash the kernel. hfsplus_fill_super() trusts inconsistent volume-header state and later causes hfsplus_create_attributes_file() to reach BUG_ON() instead of returning an I/O error. Local access and a malformed HFS+ volume are required; the assertion can interrupt the host or embedded appliance.

The record

CVE
CVE-2025-38712
Published
Sep 4, 2025
Updated
May 12, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-20, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 4, 2025CVE publishedPublication date reported by the CVE source.
  2. May 12, 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=3.13
  2. Affected versionversion=95e0d7dbb9b28ab0dfad7c7316066b05e1f1d4cd <03cd1db1494cf930e2fa042c9c13e32bffdb4eba
  3. Affected versionversion=95e0d7dbb9b28ab0dfad7c7316066b05e1f1d4cd <1bb8da27ff15e346d4bc9e248e819c9a88ebf9d6
  4. Affected versionversion=95e0d7dbb9b28ab0dfad7c7316066b05e1f1d4cd <9046566fa692f88954dac8c510f37ee17a15fdb7
  5. Affected versionversion=95e0d7dbb9b28ab0dfad7c7316066b05e1f1d4cd <b3359392b75395a31af739a761f48f4041148226
  6. Affected versionversion=95e0d7dbb9b28ab0dfad7c7316066b05e1f1d4cd <bb0eea8e375677f586ad11c12e2525ed3fc698c2
  7. Affected versionversion=95e0d7dbb9b28ab0dfad7c7316066b05e1f1d4cd <c7c6363ca186747ebc2df10c8a1a51e66e0e32d9
  8. Affected versionversion=95e0d7dbb9b28ab0dfad7c7316066b05e1f1d4cd <ce5e387f396cbb5c061d9837abcac731e9e06f4d
  9. Affected versionversion=95e0d7dbb9b28ab0dfad7c7316066b05e1f1d4cd <d768e3ed430e89a699bf89d3214dcbbf4648c939
  10. Affected versionversion=95e0d7dbb9b28ab0dfad7c7316066b05e1f1d4cd <dee5c668ad71ddbcb4b48d95e8a4f371314ad41d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.13; version=95e0d7dbb9b28ab0dfad7c7316066b05e1f1d4cd <03cd1db1494cf930e2fa042c9c13e32bffdb4eba; version=95e0d7dbb9b28ab0dfad7c7316066b05e1f1d4cd <1bb8da27ff15e346d4bc9e248e819c9a88ebf9d6; version=95e0d7dbb9b28ab0dfad7c7316066b05e1f1d4cd <9046566fa692f88954dac8c510f37ee17a15fdb7; version=95e0d7dbb9b28ab0dfad7c7316066b05e1f1d4cd <b3359392b75395a31af739a761f48f4041148226; version=95e0d7dbb9b28ab0dfad7c7316066b05e1f1d4cd <bb0eea8e375677f586ad11c12e2525ed3fc698c2; version=95e0d7dbb9b28ab0dfad7c7316066b05e1f1d4cd <c7c6363ca186747ebc2df10c8a1a51e66e0e32d9; version=95e0d7dbb9b28ab0dfad7c7316066b05e1f1d4cd <ce5e387f396cbb5c061d9837abcac731e9e06f4d; version=95e0d7dbb9b28ab0dfad7c7316066b05e1f1d4cd <d768e3ed430e89a699bf89d3214dcbbf4648c939; version=95e0d7dbb9b28ab0dfad7c7316066b05e1f1d4cd <dee5c668ad71ddbcb4b48d95e8a4f371314ad41d
Siemens · SIMATIC CN 4100version=0 <V5.0

Published CVSS scores

5.5Siemens ProductCERTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Amazon LinuxCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499.004Application or System Exploitation

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