CVE-2025-40141

Kernel memory corruption via stale ISO socket pointer

Published Nov 12, 2025 · Updated Aug 5, 2026

Use-after-free in the Linux kernel Bluetooth ISO subsystem allows local users to corrupt kernel memory through ISO sockets. Concurrent listen() and close() calls can leave iso_conn->sk pointing to a freed socket, so iso_conn_free() dereferences and writes through stale memory. An unprivileged local user can create the socket, while an attacker-controlled LE Audio peer can complete connection teardown; consequences include kernel-memory disclosure, targeted kernel writes, and a kernel panic.

CVSS severity8.0
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel Bluetooth ISO subsystem allows local users to corrupt kernel memory through ISO sockets. Concurrent listen() and close() calls can leave iso_conn->sk pointing to a freed socket, so iso_conn_free() dereferences and writes through stale memory. An unprivileged local user can create the socket, while an attacker-controlled LE Audio peer can complete connection teardown; consequences include kernel-memory disclosure, targeted kernel writes, and a kernel panic.

The record

CVE
CVE-2025-40141
Published
Nov 12, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 12, 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=6.0
  2. Affected versionversion=ccf74f2390d60a2f9a75ef496d2564abb478f46a <5319145a07d8bf5b0782b25cb3115825689d42bb
  3. Affected versionversion=ccf74f2390d60a2f9a75ef496d2564abb478f46a <80689777919f02328eb873769de4647c9dd3e371
  4. Affected versionversion=ccf74f2390d60a2f9a75ef496d2564abb478f46a <9950f095d6c875dbe0c9ebfcf972ec88fdf26fc8
  5. Affected versionversion=ccf74f2390d60a2f9a75ef496d2564abb478f46a <c92ad1a155ccfa38b87bd1d998287e1c0a24248d
  6. Affected versionversion=ccf74f2390d60a2f9a75ef496d2564abb478f46a <eba6d787ec117a5d2c60f9644e0a39c18542b6be

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.0; version=ccf74f2390d60a2f9a75ef496d2564abb478f46a <5319145a07d8bf5b0782b25cb3115825689d42bb; version=ccf74f2390d60a2f9a75ef496d2564abb478f46a <80689777919f02328eb873769de4647c9dd3e371; version=ccf74f2390d60a2f9a75ef496d2564abb478f46a <9950f095d6c875dbe0c9ebfcf972ec88fdf26fc8; version=ccf74f2390d60a2f9a75ef496d2564abb478f46a <c92ad1a155ccfa38b87bd1d998287e1c0a24248d; version=ccf74f2390d60a2f9a75ef496d2564abb478f46a <eba6d787ec117a5d2c60f9644e0a39c18542b6be

Published CVSS scores

8.0LinuxCVSS:3.1/AV:A/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.

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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)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

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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