SB2026100768 - Buffer overflow in Linux kernel bluetooth driver

Description

This security bulletin contains information about 1 vulnerability.

1) Buffer overflow (CVE-ID: CVE-2026-98296)

CWE-ID: CWE-120 - Buffer overflow

CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local user to corrupt memory beyond a DMA buffer.

The vulnerability exists due to copying data without checking its size against the destination buffer in btintel_pcie_prepare_tx() when processing oversized transmit packets through btintel_pcie_send_sync(). A local user can cause an oversized packet to reach the unchecked memcpy to corrupt memory beyond a DMA buffer.

The DMA slot has a fixed capacity of 4096 bytes. The described exploitation depends on a future caller submitting oversized packets through this path; the existing btintel_pcie_send_frame() entry point rejects oversized packets.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/4b837ebd0ea21ae5cc26f02dc042edc6fe7b46b9
• https://git.kernel.org/stable/c/84f353256e170dc4865d45007d1bc446ed566da7
• https://git.kernel.org/stable/c/c298a61e18029401486c40298a50fbeea7e7b663