CVE-2026-53209Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 63f365eb4d1668a04070151b555d55a07ede8d4b builds before 10b0e832cc05d7aef4b92bed912cbd4a395d0862; from c621211b308816889f0a3246de448bfcef8ab3ab before 1338ee049a8910ba6c9cee963920e978e6893c7d; 907ef6e12fb558a0763e894311eb245a94c192dd builds before 02f50e8bb69f9b22516163a09922f5537d3b12d1; from 5725bc608252050ed8a4d47d59225b7dd73474c8 before dafc9f57140e66a10945127aa7433c3d715dc253; from 5725bc608252050ed8a4d47d59225b7dd73474c8 before cdd8bbdbee763fdf5bf343e6f7d4e79347739f62; 5725bc608252050ed8a4d47d59225b7dd73474c8 builds before 5c65b96b549ea2dcfde497436bf9e048deb87758; 15da883c010cbc2a84aec1738b6ad6ee477846de; from 6.1.142 before 6.1.176; and 3 more ranges | CNA record |
linux linux_kernel linux:linux_kernel | from 6.1.142 before 6.1.176; from 6.6.94 before 6.6.143; from 6.12.34 before 6.12.94; from 6.15.3 before 6.16; from 6.16.1 before 6.18.36; from 6.19 before 7.0.13; 6.16; 6.16; and 11 more ranges | NVD |
References
- https://git.kernel.org/stable/c/10b0e832cc05d7aef4b92bed912cbd4a395d0862patch
- https://git.kernel.org/stable/c/1338ee049a8910ba6c9cee963920e978e6893c7dpatch
- https://git.kernel.org/stable/c/02f50e8bb69f9b22516163a09922f5537d3b12d1patch
- https://git.kernel.org/stable/c/dafc9f57140e66a10945127aa7433c3d715dc253patch
- https://git.kernel.org/stable/c/cdd8bbdbee763fdf5bf343e6f7d4e79347739f62patch
- https://git.kernel.org/stable/c/5c65b96b549ea2dcfde497436bf9e048deb87758patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.