The Bluetooth Classic implementation in Silicon Labs iWRAP 6.3.0 and earlier does not…
Priority LOW 29Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.00413 35th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:silabs:iwrap:*:*:*:*:*:*:*:* | up to 6.3.0 | Vulnerable | silabs.com |
| cpe:2.3:h:silabs:wt32i-a:-:*:*:*:*:*:*:* | not specified by NVD | Running on | silabs.com |
- cpe:2.3:a:silabs:iwrap:*:*:*:*:*:*:*:* Versions up to 6.3.0 Vulnerable ·silabs.com
- cpe:2.3:h:silabs:wt32i-a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·silabs.com
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-31609
- 2026-10-03 Alias added: GHSA-gjhp-fhfw-fvx3
References
Sources
- CVE-2021-31609 · CVE Program
- CVE-2021-31609 · NVD
- FIRST EPSS
- GHSA-gjhp-fhfw-fvx3 · GitHub Advisory Database · CC BY 4.0
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