CVE-2025-40213

Kernel compromise via Bluetooth management memory corruption

Published Nov 24, 2025 · Updated Nov 24, 2025

Memory corruption in the Linux kernel allows local users with CAP_NET_ADMIN to disclose memory, corrupt control data, or crash the kernel. set_mesh_sync copies excess bytes from a misdeclared on-stack flexible array, while set_mesh_complete deletes a pending command twice and can reuse a freed socket. Exploitation requires a local trusted Bluetooth management socket; no over-the-air interaction or victim action is required.

CVSS severity7.8
High
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

Memory corruption in the Linux kernel allows local users with CAP_NET_ADMIN to disclose memory, corrupt control data, or crash the kernel. set_mesh_sync copies excess bytes from a misdeclared on-stack flexible array, while set_mesh_complete deletes a pending command twice and can reuse a freed socket. Exploitation requires a local trusted Bluetooth management socket; no over-the-air interaction or victim action is required.

The record

CVE
CVE-2025-40213
Published
Nov 24, 2025
Updated
Nov 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Nov 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 24, 2025Record 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=302a1f674c00dd5581ab8e493ef44767c5101aab <1c9aca1787e8395a2c59fef20e914467958969c5
  2. Affected versionversion=302a1f674c00dd5581ab8e493ef44767c5101aab <e8785404de06a69d89dcdd1e9a0b6ea42dc6d327
  3. Affected versionversion=6.17
  4. Affected versionversion=87a1f16f07c6c43771754075e08f45b41d237421
  5. Affected versionversion=d71b98f253b079cbadc83266383f26fe7e9e103b <5c19daa93d9af29f1f46251b47e1ea66bcc8d679

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=302a1f674c00dd5581ab8e493ef44767c5101aab <1c9aca1787e8395a2c59fef20e914467958969c5; version=302a1f674c00dd5581ab8e493ef44767c5101aab <e8785404de06a69d89dcdd1e9a0b6ea42dc6d327; version=6.17; version=87a1f16f07c6c43771754075e08f45b41d237421; version=d71b98f253b079cbadc83266383f26fe7e9e103b <5c19daa93d9af29f1f46251b47e1ea66bcc8d679

Published CVSS scores

7.8Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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