CVE-2025-38713

Kernel memory disclosure or crash via unchecked length

Published Sep 4, 2025 · Updated Aug 5, 2026

An out-of-bounds read in Linux and SIMATIC CN 4100 before V5.0 allows local users to disclose kernel memory or crash via a crafted HFS+ volume. hfsplus_uni2asc() trusts the 16-bit hfsplus_unistr length from a Catalog or Attributes B-tree node and reads beyond the fixed 255-character Unicode array. Exploitation requires the image to be mounted and a directory or extended-attribute lookup; direct mounting needs elevated capability, but delegated or automatic mounting can expose unprivileged users.

CVSS severity7.1
High
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

An out-of-bounds read in Linux and SIMATIC CN 4100 before V5.0 allows local users to disclose kernel memory or crash via a crafted HFS+ volume. hfsplus_uni2asc() trusts the 16-bit hfsplus_unistr length from a Catalog or Attributes B-tree node and reads beyond the fixed 255-character Unicode array. Exploitation requires the image to be mounted and a directory or extended-attribute lookup; direct mounting needs elevated capability, but delegated or automatic mounting can expose unprivileged users.

The record

CVE
CVE-2025-38713
Published
Sep 4, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-20, CWE-125, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <13604b1d7e7b125fb428cddbec6b8d92baad25d5
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1ca69007e52a73bd8b84b988b61b319816ca8b01
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <291bb5d931c6f3cd7227b913302a17be21cf53b0
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6f93694bcbc2c2ab3e01cd8fba2f296faf34e6b9
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <73f7da507d787b489761a0fa280716f84fa32b2f
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <76a4c6636a69d69409aa253b049b1be717a539c5
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <94458781aee6045bd3d0ad4b80b02886b9e2219b
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ccf0ad56a779e6704c0b27f555dec847f50c7557
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f7534cbfac0a9ffa4fa17cacc6e8b6446dae24ee
  10. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <13604b1d7e7b125fb428cddbec6b8d92baad25d5; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1ca69007e52a73bd8b84b988b61b319816ca8b01; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <291bb5d931c6f3cd7227b913302a17be21cf53b0; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6f93694bcbc2c2ab3e01cd8fba2f296faf34e6b9; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <73f7da507d787b489761a0fa280716f84fa32b2f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <76a4c6636a69d69409aa253b049b1be717a539c5; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <94458781aee6045bd3d0ad4b80b02886b9e2219b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ccf0ad56a779e6704c0b27f555dec847f50c7557; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f7534cbfac0a9ffa4fa17cacc6e8b6446dae24ee; version=2.6.12
Siemens · SIMATIC CN 4100version=0 <V5.0

Published CVSS scores

7.0Siemens ProductCERTCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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-20Improper Input Validation
CWE-125Out-of-bounds Read
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

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Your stack

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