CVE-2026-19570 Zephyr Bluetooth LE Audio Broadcast Sink - Buffer Overflow

Zephyr Bluetooth LE Audio Broadcast Sink contains a buffer overflow caused by lack of bounds checking when copying subgroup metadata from Basic Audio Announcement (BASE), letting remote attackers in radio range cause memory corruption and potential remote code execution, exploit requires attacker to be in radio range and send crafted BASE data.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.29% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Remote Code Execution, Information Disclosure
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
9 October 2026
Updated
15 October 2026
Weakness
CWE-120

Vendor fix

Update to the latest Zephyr version containing the fix that rejects oversized BASE subgroups and clamps metadata copying.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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