Uninitialized IV in Silicon Labs SE FW v2.0.0 through v 2.2.1 for internally stored data

published 2023-06-15 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-34208

cvss: 3.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 5%
public exploits: 0; none known

The initialization vector (IV) used by the secure engine (SE) for encrypting data stored in the SE flash memory is uninitialized.

Patch / fix

fixed in 1

silabs gecko_software_development_kit 2.2.1

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 22 mo ago (2024-12-11)

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	3.1	CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
NVD	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

silabs.com GSDK

Classification

Weakness

CWE-1204 Generation of Weak Initialization Vector (IV)
CWE-908 Use of Uninitialized Resource

References

community.silabs.com /sfc/servlet.shepherd/document/download/0698Y00000U2sFvQAJ?operationContext=S1
permissions-required
github.com /SiliconLabs/gecko_sdk
product

Sources

CVE List CVE-2023-2747
NVD CVE-2023-2747

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.

Summary