What’s Vulnerable › Vulnerabilities

CVE-2021-31609

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-09-07 · updated 2026-06-17

Description

The Bluetooth Classic implementation in Silicon Labs iWRAP 6.3.0 and earlier does not properly handle the reception of an oversized LMP packet greater than 17 bytes, allowing attackers in radio range to trigger a crash in WT32i via a crafted LMP packet.

Affected products

• Silabs Iwrap: through 6.3.0

References

• https://dl.packetstormsecurity.net/papers/general/braktooth.pdf
• https://www.silabs.com/wireless/bluetooth/bluegiga-classic-legacy-modules/device.wt32i-a
• https://dl.packetstormsecurity.net/papers/general/braktooth.pdf
• https://www.silabs.com/wireless/bluetooth/bluegiga-classic-legacy-modules/device.wt32i-a

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