CVE-2026-53209

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An issue exists in the Bluetooth component where the hci adv bcast annoucement() function fails to properly validate the size of the combined data when prepending Broadcast Announcement service data to an existing advertising payload. If the existing payload already contains the maximum extended advertising data, the resulting combined data may exceed the capacity of the temporary buffer used to rebuild the advertising data, leading to a buffer overrun.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.