Vulnerability Description
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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.1.142, < 6.1.176 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/02f50e8bb69f9b22516163a09922f5537d3b12d1Patch
- https://git.kernel.org/stable/c/10b0e832cc05d7aef4b92bed912cbd4a395d0862Patch
- https://git.kernel.org/stable/c/1338ee049a8910ba6c9cee963920e978e6893c7dPatch
- https://git.kernel.org/stable/c/5c65b96b549ea2dcfde497436bf9e048deb87758Patch
- https://git.kernel.org/stable/c/cdd8bbdbee763fdf5bf343e6f7d4e79347739f62Patch
- https://git.kernel.org/stable/c/dafc9f57140e66a10945127aa7433c3d715dc253Patch
FAQ
What is CVE-2026-53209?
CVE-2026-53209 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 e...
How severe is CVE-2026-53209?
CVE-2026-53209 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-53209?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.