CVE-2026-80186

Summary

A stack-based buffer overflow vulnerability exists in BlueZ, the Linux Bluetooth protocol stack. A remote user within Bluetooth radio range can send a specially crafted Extended Inquiry Response (EIR) packet that causes a buffer overflow when the target device performs Bluetooth discovery. This vulnerability can lead to a Denial of Service (DoS) by crashing the bluetoothd service and may allow for arbitrary code execution.

Affected Software

Weaknesses

• CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

References

• https://access.redhat.com/security/cve/CVE-2026-80186
• https://bugzilla.redhat.com/show_bug.cgi?id=2524132
• https://github.com/bluez/bluez/security/advisories/GHSA-68h6-5qgp-3975

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