Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend

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Summary

CVECVE-2026-53209
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-25 09:16:38 UTC
Updated2026-06-28 08:16:38 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001800000 probability, percentile 0.078170000 (date 2026-06-27)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 63f365eb4d1668a04070151b555d55a07ede8d4b 10b0e832cc05d7aef4b92bed912cbd4a395d0862 git Not specified
CNA Linux Linux affected c621211b308816889f0a3246de448bfcef8ab3ab 1338ee049a8910ba6c9cee963920e978e6893c7d git Not specified
CNA Linux Linux affected 907ef6e12fb558a0763e894311eb245a94c192dd 02f50e8bb69f9b22516163a09922f5537d3b12d1 git Not specified
CNA Linux Linux affected 5725bc608252050ed8a4d47d59225b7dd73474c8 dafc9f57140e66a10945127aa7433c3d715dc253 git Not specified
CNA Linux Linux affected 5725bc608252050ed8a4d47d59225b7dd73474c8 cdd8bbdbee763fdf5bf343e6f7d4e79347739f62 git Not specified
CNA Linux Linux affected 5725bc608252050ed8a4d47d59225b7dd73474c8 5c65b96b549ea2dcfde497436bf9e048deb87758 git Not specified
CNA Linux Linux affected 15da883c010cbc2a84aec1738b6ad6ee477846de git Not specified
CNA Linux Linux affected 6.1.142 6.1.176 semver Not specified
CNA Linux Linux affected 6.6.94 6.6.143 semver Not specified
CNA Linux Linux affected 6.12.34 6.12.94 semver Not specified
CNA Linux Linux affected 6.15.3 6.16 semver Not specified
CNA Linux Linux affected 6.16 Not specified
CNA Linux Linux unaffected 6.16 semver Not specified
CNA Linux Linux unaffected 6.1.176 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.143 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.94 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.36 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.13 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/1338ee049a8910ba6c9cee963920e978e6893c7d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5c65b96b549ea2dcfde497436bf9e048deb87758 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/dafc9f57140e66a10945127aa7433c3d715dc253 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/cdd8bbdbee763fdf5bf343e6f7d4e79347739f62 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/10b0e832cc05d7aef4b92bed912cbd4a395d0862 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/02f50e8bb69f9b22516163a09922f5537d3b12d1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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