CVE-2023-53374

HIGH

Linux Kernel 6.3.8-6.4 - Use-After-Free in Bluetooth SCO/ISO Connection Cleanup

Title source: llm
STIX 2.1

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early Not calling hci_(dis)connect_cfm before deleting conn referred to by a socket generally results to use-after-free. When cleaning up SCO connections when the parent ACL is deleted too early, use hci_conn_failed to do the connection cleanup properly. We also need to clean up ISO connections in a similar situation when connecting has started but LE Create CIS is not yet sent, so do it too here.

Scores

CVSS v3 7.8
EPSS 0.0015
EPSS Percentile 4.3%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-416
Status published
Products (12)
Linux/Linux < 6.4
Linux/Linux 6.3.8 - 6.4
Linux/Linux 6.4
Linux/Linux 6.4.16 - 6.4.*
Linux/Linux 6.5.3 - 6.5.*
Linux/Linux 6.6
Linux/Linux 75e35bd4b7935ceed2aacd82f55940e73bf0b63b
Linux/Linux ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f - 3344d318337d9dca928fd448e966557ec5063f85
Linux/Linux ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f - 397d58007532644b35fad746da48c41161f32a57
Linux/Linux ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f - e94b898463a62b72a2a8b75dea8936bf4db78e00
... and 2 more
Published Sep 18, 2025
Tracked Since Feb 18, 2026