CVE-2026-97976 Bluetooth: btintel_pcie: validate packet_len before skb_put_data
An out-of-bounds read in the Linux kernel Bluetooth Intel PCIe driver allows attackers with local access or malicious firmware to cause crashes or leak memory.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-97976?
CVE-2026-97976 is a memory corruption vulnerability in Linux, published on 25 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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().
Which versions are affected by CVE-2026-97976?
How do I fix CVE-2026-97976?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-97976 being exploited?
There is no known exploitation of CVE-2026-97976 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-97976, DEBIAN-CVE-2026-97976, GHSA-wxpf-g955-mjcc, UBUNTU-CVE-2026-97976.