Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.8epss 0.1%
exploitation probability
0.1%top 97% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/02f50e8bb69f9b22516163a09922f5537d3b12d1https://git.kernel.org/stable/c/10b0e832cc05d7aef4b92bed912cbd4a395d0862https://git.kernel.org/stable/c/1338ee049a8910ba6c9cee963920e978e6893c7dhttps://git.kernel.org/stable/c/5c65b96b549ea2dcfde497436bf9e048deb87758https://git.kernel.org/stable/c/cdd8bbdbee763fdf5bf343e6f7d4e79347739f62https://git.kernel.org/stable/c/dafc9f57140e66a10945127aa7433c3d715dc253