# CVE-2026-98296: Linux kernel Bluetooth btintel_pcie buffer overflow in TX

Source: https://junglewise.ai/threats/cve-2026-98296-in-the-linux-kernel-the-following-vulnerability-has-been-resolved  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-06. Updated: 2026-10-06  
License: CC BY 4.0 with a link back

CVE-2026-98296 · Severity: info · Published 2026-10-06

The Linux kernel's Bluetooth Intel PCIe driver contains a buffer overflow vulnerability in packet transmission. An attacker with the ability to send oversized packets through the btintel_pcie_send_sync() function could overflow a 4096-byte DMA buffer, potentially causing kernel memory corruption or system crash.

## Quick answers

**Is CVE-2026-98296 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-98296 being exploited in the wild.

**How severe is CVE-2026-98296?** Informational severity, published 6 October 2026.

**Which products and versions are affected?** Linux Kernels with btintel_pcie driver prior to commit 4b837ebd0ea21ae5cc26f02dc042edc6fe7b46b9.

**Is there a fix for CVE-2026-98296?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-98296 attacked?** It is in an operating system.

**Am I affected by CVE-2026-98296?** Check whether you run Linux at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The btintel_pcie_prepare_tx() function performs an unchecked memcpy() of skb->len bytes into a fixed 4096-byte DMA buffer. While btintel_pcie_send_frame() validated packet size, direct callers of btintel_pcie_send_sync() could bypass this check. The fix adds length validation in btintel_pcie_send_sync() before the DMA copy, returning -EMSGSIZE for oversized packets.

## Affected products

- Linux Kernels with btintel_pcie driver prior to commit 4b837ebd0ea21ae5cc26f02dc042edc6fe7b46b9

## Timeline

- 2026-10-06: disclosed

## References

- [https://git.kernel.org/stable/c/4b837ebd0ea21ae5cc26f02dc042edc6fe7b46b9](https://git.kernel.org/stable/c/4b837ebd0ea21ae5cc26f02dc042edc6fe7b46b9)
- [https://git.kernel.org/stable/c/84f353256e170dc4865d45007d1bc446ed566da7](https://git.kernel.org/stable/c/84f353256e170dc4865d45007d1bc446ed566da7)

## Related threats

- [Linux GPU driver NULL pointer dereference denial of service](https://junglewise.ai/threats/cve-2026-43603-a-null-pointer-dereference-in-the-linux-gpu-driver-could)