Silicon Labs Bluetooth Low Energy SDK before 2.13.3 has a buffer overflow via packet data.

published 2020-08-19 6y ago modified 2026-06-17 4mo ago also EUVD-2020-7519

cvss: 6.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.2%; EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits: 0; none known

Silicon Labs Bluetooth Low Energy SDK before 2.13.3 has a buffer overflow via packet data. This is an over-the-air denial of service vulnerability in Bluetooth LE in EFR32 SoCs and associated modules running Bluetooth SDK, supporting Central or Observer roles.

Patch / fix

fixed in 1

silabs bluetooth_low_energy_software_development_kit 2.13.3.0

Is CVE-2020-15532 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Exploit prediction

1.18% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

github.com https://github.com/darkmentorllc/jackbnimble/blob/master/host/pocs/silabs_efr32_extadv_dos.py referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.5	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	3.3	AV:A/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

CWE-120 Buffer Copy without Checking Size of Input

References

github.com /darkmentorllc/jackbnimble/blob/master/host/pocs/silabs_efr32_extadv_dos.py
exploit, third-party-advisory
blackhat.com /us-20/briefings/schedule/#finding-new-bluetooth-low-energy-exploits-via-reverse-engineering-multiple-vendors-
third-party-advisory
github.com /darkmentorllc/publications/tree/master/2020/TI_SILABS_BLE_RCEs
third-party-advisory

Sources

CVE List CVE-2020-15532
NVD CVE-2020-15532

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.