SB2026071410 - Memory leak in Linux kernel bluetooth

Description

This security bulletin contains information about 1 vulnerability.

1) Memory leak (CVE-ID: CVE-2026-53364)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a memory leak in hci_le_big_terminate() in the bluetooth hci connection handling component when terminating BIG synchronization state. A local user can trigger the affected code path to cause a denial of service.

The issue occurs on an early-return path when neither PA sync termination nor BIG sync termination flags are set.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/a59d4f4217e6200ca9180643e5738a87d3fa8be0
• https://git.kernel.org/stable/c/bfa9d28960ed677d556bdf097073bc3129686229
• https://git.kernel.org/stable/c/e6b78019664dfe37c3dc707f50e7b453d6c7726d