CVE-2026-2815 json
Incorrect use of the PUF key for user key generation in EFR32xG27 results in predictable keys
published 2026-06-25 4 mo ago modified 2026-10-25 14 d ago also EUVD-2026-39394
- cvss
- 8.4
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 16%
- public exploits
- 0
- none known
Summary
Incorrect use of the PUF key for user key generation in EFR32xG27 results in predictable keys
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.4 | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N |
| CNA | 4.0 | 8.4 | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- Silicon Labs SiSDK
Classification
- Weakness
-
- CWE-339 Small Seed Space in PRNG
References
-
github.com
/SiliconLabsSoftware/sisdk-release
patch
-
siliconlabs.lightning.force.com
/sfc/servlet.shepherd/document/download/069Vm00000kDYsfIAG?operationContext=S1
vendor-advisory, permissions-required
Sources
- CVE List CVE-2026-2815
- NVD CVE-2026-2815
Fencer Vulns 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.