HighFix available
Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend
Type: advisorySources: OSV
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.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 6.1.176, 6.12.94, 6.18.36, 6.6.143, 7.0.13
- CVEs
- CVE-2026-53209
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 22:43 UTC · Revision 1
Source evidence
Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend
core-osv · Original sourcePublished 25 Jun 2026, 08:39 UTC
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.
osv:CVE-2026-53209
Kernel
Fixed versions: 6.1.176, 6.6.143, 6.12.94, 6.18.36, 7.0.13
Complete source record
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