Potential DoS due to BusFault and Assert in Ember ZNet legacy packet buffer
Priority LOW 39CWE-770Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-770.
Summary
Due to an allocation of resources without limits, an uncontrolled resource consumption vulnerability exists in Silicon Labs Ember ZNet SDK prior to v7.4.0.0 (delivered as part of Silicon Labs Gecko SDK v4.4.0) which may enable attackers to trigger a bus fault and crash of the device, requiring a reboot in order to rejoin the network.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00515 44th percentileScored 2026-11-07
Fix Fixed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
No affected products listed by the sources yet.
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:silabs:emberznet:*:*:*:*:*:*:*:* | before 7.4.0 | Vulnerable | silabs.com |
- cpe:2.3:a:silabs:emberznet:*:*:*:*:*:*:*:* Versions before 7.4.0 Vulnerable ·silabs.com
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-51393
- 2026-10-03 Alias added: GHSA-r2ff-rrfq-r548
References
More silabs.com Emberznet vulnerabilities
- TI-2023-21716 Touchlink authentication bypass due to packets processed after timeout or out of range in Ember ZNet CVSS 3.1CRITICAL 10.0
- TI-2022-08741 Malformed Zigbee packet causes Assert in EmberZNet 7.0.0 or earlier CVSS 3.1CRITICAL 9.8
- TI-2023-28047 Silicon Labs EFR32xxx parts with classic key storage do not use hardware accelerated AES-CCM CVSS 3.1CRITICAL 9.8
- TI-2022-08742 Malformed Zigbee packet causes Assert in EmberZNet 7.0.1 or earlier CVSS 3.1HIGH 7.5
- TI-2023-28049 Potential DoS for EFR32xxx parts in high traffic environments due to null buffer dereference / crash CVSS 3.1HIGH 7.5
- TI-2026-34744 Simple Metering GetProfileResponse interval-bounds bug in EmberZNet v9.0.2 CVSS 4.0HIGH 7.1
Sources
- CVE-2023-51393 · CVE Program
- CVE-2023-51393 · NVD
- FIRST EPSS
- GHSA-r2ff-rrfq-r548 · GitHub Advisory Database · CC BY 4.0
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