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.
References5
- git.kernel.org/stable/c/2f5d635ad5906b0235bc0c870e8beba3116e1e98
- git.kernel.org/stable/c/301a4e2e89313dee10f0e8cb084daedbbe4a3dce
- git.kernel.org/stable/c/9a77f296aff4b2ca5f2928ab3a3220c82d8b4074
- git.kernel.org/stable/c/a4de6fc95b2f36967fc247ae51cad2171194f7cd
- git.kernel.org/stable/c/f0a544ef6e38e4063d0ed72ad83d6bf0f4e70805
Metrics
- CVSS 3.1
-
8.8
HIGH
Score source: CNA
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 17 · as of 8 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.