CVE-2023-53018: Bluetooth: hci_conn: Fix memory leaks

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-03-27 · updated 2026-06-17
Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: Fix memory leaks When hci_cmd_sync_queue() failed in hci_le_terminate_big() or hci_le_big_terminate(), the memory pointed by variable d is not freed, which will cause memory leak. Add release process to error path.

Affected products

Linux kernel: from 6.0 before 6.1.9; 6.2-rc1, 6.2-rc2, 6.2-rc3, 6.2-rc4 — fixed in 6.1.9

How to fix

Upgrade to a fixed version: Linux kernel 6.1.9. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/3aa21311f36d8a2730c7ccef37235e951f23927b
https://git.kernel.org/stable/c/f51a825b9f730a782aa768454906b4468e67b667

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