SB20261022336 - Buffer overflow in Linux kernel bluetooth driver

Description

This security bulletin contains information about 1 vulnerability.

1) Buffer overflow (CVE-ID: CVE-2026-98730)

CWE-ID: CWE-120 - Buffer overflow

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local privileged user to corrupt kernel memory and potentially cause a denial of service.

The vulnerability exists due to a buffer overflow in the Linux kernel Bluetooth btintel_pcie driver when processing oversized transmit packets. A local privileged user can inject an oversized packet through HCI_CHANNEL_USER to cause btintel_pcie_prepare_tx() to copy packet data beyond a fixed 4096-byte DMA buffer after a 4-byte PCIe type header is prepended, corrupting kernel memory and potentially causing a denial of service.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/3d6ba6be9bef13edcd4ad74f7cfdd0c34db4d2bc
• https://git.kernel.org/stable/c/84df222de86eabed543361025ed54ce838c0b573
• https://git.kernel.org/stable/c/9806a748f9ab223b733624367b6ddda77fb9450e
• https://git.kernel.org/stable/c/f771f96557a4d953a7e4d045870547271e36e819