TI-2023-29664 Aliases CVE-2023-53374 GHSA-wwxc-q6v4-r672

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

LOW 39CWE-416Published 2025-09-18 · Updated 2026-08-05

Key facts

Attack vector: Adjacent network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00216 12th percentileScored 2026-11-07

Fix Fixed Linux (Linux): 6.4, 6.4.16, 6.5.3 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Linux	Linux	6.3.8 to before 6.4	6.4	Patch available	CNA
Linux	Linux	6.4 and later	6.4.16, 6.5.3, 6.6	Patch available	CNA

Linux VendorLinux Affected 6.3.8 to before 6.4 Fixed in 6.4 Patch available CNA
Linux VendorLinux Affected 6.4 and later Fixed in 6.4.16, 6.5.3, 6.6 Patch available CNA

CPE configurations NVD · 6

CPE	Versions	Role	Vendor
cpe:2.3:o:linux:linux_kernel::::::::	6.3.8 to before 6.4; 6.4.1 to before 6.4.16; 6.5 to before 6.5.3	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:6.4:-::::::	6.4	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:6.4:rc4::::::	6.4 rc4	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:6.4:rc5::::::	6.4 rc5	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:6.4:rc6::::::	6.4 rc6	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:6.4:rc7::::::	6.4 rc7	Vulnerable	Linux

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.3.8 to before 6.4; 6.4.1 to before 6.4.16; 6.5 to before 6.5.3 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:6.4:-:*:*:*:*:*:* Versions 6.4 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:6.4:rc4:*:*:*:*:*:* Versions 6.4 rc4 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:6.4:rc5:*:*:*:*:*:* Versions 6.4 rc5 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:6.4:rc6:*:*:*:*:*:* Versions 6.4 rc6 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:6.4:rc7:*:*:*:*:*:* Versions 6.4 rc7 Vulnerable ·Linux

Remediation

Fix · CNA Linux (Linux) Fixed in 6.4
Fix · CNA Linux (Linux) Fixed in 6.4.16, 6.5.3, 6.6

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 5 products

Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Timeline

2026-10-02 Threatist record created from CVE-2023-53374
2026-10-03 Alias added: GHSA-wwxc-q6v4-r672

References

Patch 3

TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3

See all 15278 →

Sources

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