Riskcovery

CVE-2023-53374

Bluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early

State
Published
Severity
8.8 High
Published
Sep 18, 2025
Updated
Aug 5, 2026
Reserved
Sep 17, 2025

Read the record on cve.org

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

CVSSScoreVectorSource
3.18.8 HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCISA-ADP

Weaknesses

Affected Products

ProductVersions
LinuxLinux
  • ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f to before 397d58007532644b35fad746da48c41161f32a57Affected
  • ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f to before e94b898463a62b72a2a8b75dea8936bf4db78e00Affected
  • ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f to before 3344d318337d9dca928fd448e966557ec5063f85Affected
  • 75e35bd4b7935ceed2aacd82f55940e73bf0b63bAffected
  • 6.3.8 to before 6.4Affected
LinuxLinux
  • 6.4Affected
  • before 6.4Not affected
  • 6.4.16 through 6.4.*Not affected
  • 6.5.3 through 6.5.*Not affected
  • 6.6 and laterNot affected

References

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