CVE-2026-98731 Bluetooth: btintel_pcie: fix plen overflow in btintel_pcie_recv_frame()
An integer overflow in the Linux kernel Bluetooth driver allows attackers to bypass length checks, potentially causing a denial of service.
- 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-2026-98731?
CVE-2026-98731 is a vulnerability in Linux, published on 18 Oct 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: fix plen overflow in btintel_pcie_recv_frame()
plen is u16 and computed as HDR_SIZE + dlen. For ACL/ISO frames dlen is a 16-bit field, so a value >= 0xFFFC wraps the sum, bypassing the "skb->len < plen" check and letting skb_trim() truncate the packet.
Widen plen to u32 so the addition cannot wrap.
Which versions are affected by CVE-2026-98731?
How do I fix CVE-2026-98731?
Apply the vendor's patch.
Is CVE-2026-98731 being exploited?
There is no known exploitation of CVE-2026-98731 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-98731, DEBIAN-CVE-2026-98731, GHSA-8674-5775-h37c, UBUNTU-CVE-2026-98731.