SB20261022337 - Integer overflow in Linux kernel bluetooth driver

Description

This security bulletin contains information about 1 vulnerability.

1) Integer overflow (CVE-ID: CVE-2026-98731)

CWE-ID: CWE-190 - Integer overflow

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local user to bypass packet-length validation and cause incorrect truncation of Bluetooth packets.

The vulnerability exists due to an integer overflow in btintel_pcie_recv_frame() in the Linux kernel when calculating packet lengths for Bluetooth ACL or ISO frames. A local user can supply a crafted frame with a dlen value of at least 0xFFFC to overflow the 16-bit plen calculation, bypass the skb->len < plen check, and cause skb_trim() to truncate the packet incorrectly.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/7dbeb6935ac331b0cba6c41cabd8e9d02d5f64ea
• https://git.kernel.org/stable/c/b2cb5ea1dc8cf829816370fc1399e6a1d2d1bca9
• https://git.kernel.org/stable/c/c3a3842c109ac130c6db3aa0014cc8cd344928ad
• https://git.kernel.org/stable/c/c3b5e6da4ba6485bffda9753d8339c28855207aa