CVE-2025-38006

Service interruption via uninitialized MCTP interface index

Published Jun 18, 2025 · Updated May 11, 2026

Use of uninitialized memory in Linux kernel MCTP allows local users to interrupt service through a malformed address-dump request. The mctp_dump_addrinfo function reads hdr->ifa_index without first verifying that the netlink message contains a struct ifaddrmsg, then compares the uninitialized value while filtering interfaces. Exploitation requires local low-privileged access and affects availability; no confidentiality or integrity impact is reported.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of uninitialized memory in Linux kernel MCTP allows local users to interrupt service through a malformed address-dump request. The mctp_dump_addrinfo function reads hdr->ifa_index without first verifying that the netlink message contains a struct ifaddrmsg, then compares the uninitialized value while filtering interfaces. Exploitation requires local low-privileged access and affects availability; no confidentiality or integrity impact is reported.

The record

CVE
CVE-2025-38006
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 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=5.15
  2. Affected versionversion=583be982d93479ea3d85091b0fd0b01201ede87d <24fa213dffa470166ec014f979f36c6ff44afb45
  3. Affected versionversion=583be982d93479ea3d85091b0fd0b01201ede87d <8ef7b3f0db69e2f4a80be351f6aee9a4c2332ef9
  4. Affected versionversion=583be982d93479ea3d85091b0fd0b01201ede87d <acab78ae12c7fefb4f3bfe22e00770a5faa42724
  5. Affected versionversion=583be982d93479ea3d85091b0fd0b01201ede87d <d4d1561d17eb72908e4489c0900d96e0484fac20
  6. Affected versionversion=583be982d93479ea3d85091b0fd0b01201ede87d <f11cf946c0a92c560a890d68e4775723353599e1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.15; version=583be982d93479ea3d85091b0fd0b01201ede87d <24fa213dffa470166ec014f979f36c6ff44afb45; version=583be982d93479ea3d85091b0fd0b01201ede87d <8ef7b3f0db69e2f4a80be351f6aee9a4c2332ef9; version=583be982d93479ea3d85091b0fd0b01201ede87d <acab78ae12c7fefb4f3bfe22e00770a5faa42724; version=583be982d93479ea3d85091b0fd0b01201ede87d <d4d1561d17eb72908e4489c0900d96e0484fac20; version=583be982d93479ea3d85091b0fd0b01201ede87d <f11cf946c0a92c560a890d68e4775723353599e1

Published CVSS scores

7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
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.

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

CWE-908Use of Uninitialized Resource
T1499.004Endpoint Denial of Service: Application 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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