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CVE-2023-53374

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

High8.8EPSS 0.22%
Published
Updated
Reserved
Assigned by
Linux

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 scores of CVE-2023-53374, by who scored it
Scored byCVSSScoreVector
LinuxCNA (assigner)3.1High8.8CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA-ADPADP (enrichment)3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Modified3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.22% · top 88% of all CVEs (7 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.

Weakness

Affected products

  • Linux · Linux

    • affected ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f – < 397d58007532644b35fad746da48c41161f32a57
    • affected ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f – < e94b898463a62b72a2a8b75dea8936bf4db78e00
    • affected ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f – < 3344d318337d9dca928fd448e966557ec5063f85
    • affected 75e35bd4b7935ceed2aacd82f55940e73bf0b63b
    • affected 6.3.8 – < 6.4

  • Linux · Linux

    • affected 6.4
    • unaffected < 6.4
    • unaffected 6.4.16 – ≤ 6.4.*
    • unaffected 6.5.3 – ≤ 6.5.*
    • unaffected 6.6 – ≤ *

References (3)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .