CVE-2026-53209

Summary

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend

Existing advertising instances can already hold the maximum extended advertising payload. When hci_adv_bcast_annoucement() prepends the Broadcast Announcement service data to that payload, the combined data may no longer fit in the temporary buffer used to rebuild the advertising data.

Reject that case before copying the existing payload and report the failure through the device log. This keeps the existing advertising data intact and avoids overrunning the temporary buffer.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux63f365eb4d1668a04070151b555d55a07ede8d4b < 10b0e832cc05d7aef4b92bed912cbd4a395d0862affected
LinuxLinuxc621211b308816889f0a3246de448bfcef8ab3ab < 1338ee049a8910ba6c9cee963920e978e6893c7daffected
LinuxLinux907ef6e12fb558a0763e894311eb245a94c192dd < 02f50e8bb69f9b22516163a09922f5537d3b12d1affected
LinuxLinux5725bc608252050ed8a4d47d59225b7dd73474c8 < dafc9f57140e66a10945127aa7433c3d715dc253affected
LinuxLinux5725bc608252050ed8a4d47d59225b7dd73474c8 < cdd8bbdbee763fdf5bf343e6f7d4e79347739f62affected
LinuxLinux5725bc608252050ed8a4d47d59225b7dd73474c8 < 5c65b96b549ea2dcfde497436bf9e048deb87758affected
LinuxLinux15da883c010cbc2a84aec1738b6ad6ee477846deaffected
LinuxLinux6.1.142 < 6.1.176affected
LinuxLinux6.6.94 < 6.6.143affected
LinuxLinux6.12.34 < 6.12.94affected
LinuxLinux6.15.3 < 6.16affected
LinuxLinux6.16affected
LinuxLinux0 < 6.16unaffected
LinuxLinux6.1.176 <= 6.1.*unaffected
LinuxLinux6.6.143 <= 6.6.*unaffected
LinuxLinux6.12.94 <= 6.12.*unaffected
LinuxLinux6.18.36 <= 6.18.*unaffected
LinuxLinux7.0.13 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References