CVE-2025-38592

Kernel disclosure and crash via freed Bluetooth coredump

Published Aug 19, 2025 · Updated Aug 5, 2026

An out-of-bounds read in Linux kernel 6.15 through 6.15.9 and 6.16 allows local users to disclose kernel memory through Bluetooth coredumps. The hci_devcd_dump function calls dev_coredumpv before skb_put_data, so an unread earlier coredump causes dev_coredumpv to free hdev->dump.head before skb_put_data copies from it. The path requires local low-privileged access and an unread earlier device coredump; the resulting read can disclose kernel memory and crash the kernel.

CVSS severity7.1
High
EPSS probability0.22%
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 kernel 6.15 through 6.15.9 and 6.16 allows local users to disclose kernel memory through Bluetooth coredumps. The hci_devcd_dump function calls dev_coredumpv before skb_put_data, so an unread earlier coredump causes dev_coredumpv to free hdev->dump.head before skb_put_data copies from it. The path requires local low-privileged access and an unread earlier device coredump; the resulting read can disclose kernel memory and crash the kernel.

The record

CVE
CVE-2025-38592
Published
Aug 19, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 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

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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=6.15
  2. Affected versionversion=b257e02ecc46f8561d8bd88943164a10c9e90a80 <7af4d7b53502286c6cf946d397ab183e76d14820
  3. Affected versionversion=b257e02ecc46f8561d8bd88943164a10c9e90a80 <8c021ad797f9171d015cf0a932a3fbe5232190f5
  4. Affected versionversion=b257e02ecc46f8561d8bd88943164a10c9e90a80 <efd55f6a59449f8d4e4953f12c177aa902b7451f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.15; version=b257e02ecc46f8561d8bd88943164a10c9e90a80 <7af4d7b53502286c6cf946d397ab183e76d14820; version=b257e02ecc46f8561d8bd88943164a10c9e90a80 <8c021ad797f9171d015cf0a932a3fbe5232190f5; version=b257e02ecc46f8561d8bd88943164a10c9e90a80 <efd55f6a59449f8d4e4953f12c177aa902b7451f

Published CVSS scores

7.1Canonical UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
7.1NIST National Vulnerability DatabaseCVSS: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-125Out-of-bounds Read

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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