CVE-2025-38128

Kernel crash via malformed Bluetooth MGMT length

Published Jul 3, 2025 · Updated May 11, 2026

Out-of-bounds read in Linux kernel 6.13 through 6.15.2 allows local users to crash the system through a malformed Bluetooth MGMT command. The mgmt_hci_cmd_sync() path trusts params_len without confirming that the fixed header and trailing parameter bytes fit the received buffer, so skb_put_data() reads beyond it. Reaching the path requires CAP_NET_ADMIN in the initial user namespace, and successful exploitation interrupts service by crashing the kernel.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Linux kernel 6.13 through 6.15.2 allows local users to crash the system through a malformed Bluetooth MGMT command. The mgmt_hci_cmd_sync() path trusts params_len without confirming that the fixed header and trailing parameter bytes fit the received buffer, so skb_put_data() reads beyond it. Reaching the path requires CAP_NET_ADMIN in the initial user namespace, and successful exploitation interrupts service by crashing the kernel.

The record

CVE
CVE-2025-38128
Published
Jul 3, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jul 3, 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=6.13
  2. Affected versionversion=827af4787e74e8df9e8e0677a69fbb15e0856d2f <03f1700b9b4d4f2fed3165370f3c23db76553178
  3. Affected versionversion=827af4787e74e8df9e8e0677a69fbb15e0856d2f <9eeafd16d76a7642d12b3442a26c15cd345e12f7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=6.13; version=827af4787e74e8df9e8e0677a69fbb15e0856d2f <03f1700b9b4d4f2fed3165370f3c23db76553178; version=827af4787e74e8df9e8e0677a69fbb15e0856d2f <9eeafd16d76a7642d12b3442a26c15cd345e12f7

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.

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
Privilegesadmin
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

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Your stack

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