CVE-2026-98602 Bluetooth: bnep: fix out-of-bounds reads on short RX/TX frames and control fallthrough
An attacker within Bluetooth range can trigger out-of-bounds reads in the Linux kernel BNEP driver, potentially leaking sensitive memory information.
- 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-2026-98602?
CVE-2026-98602 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: bnep: fix out-of-bounds reads on short RX/TX frames and control fallthrough
Fix multiple out-of-bounds reads in Bluetooth BNEP frame processing:
1. In bnep_rx_frame() and bnep_ctrl_frame() (net/bluetooth/bnep/core.c), use pskb_may_pull() to verify the BNEP header, control type byte, filter count, and extension headers exist before reading them, and return 0 after handling BNEP_CONTROL instead of falling through to Ethernet frame submission when no extension headers follow. 2. In bnep_net_xmit() (net/bluetooth/bnep/netdev.c), verify skb->len >= ETH_HLEN with pskb_may_pull() before reading the 14-byte Ethernet header to prevent an out-of-bounds heap read and infoleak on short AF_PACKET TX frames.
Which versions are affected by CVE-2026-98602?
How do I fix CVE-2026-98602?
Apply the vendor's patch.
Is CVE-2026-98602 being exploited?
There is no known exploitation of CVE-2026-98602 in the wild and no public exploit code.
Sources
Also known as AZL-108836, BELL-CVE-2026-98602, DEBIAN-CVE-2026-98602, GHSA-qjmf-g685-hvmr, UBUNTU-CVE-2026-98602.