TI-2023-21719 Aliases CVE-2023-41097 GHSA-67c4-7f3g-r556

Potential Timing vulnerability in CBC PKCS7 padding calculations

LOW 33CWE-208Published 2023-12-21 · Updated 2025-04-23

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-208.

Summary

An Observable Timing Discrepancy, Covert Timing Channel vulnerability in Silabs GSDK on ARM potentially allows Padding Oracle Crypto Attack on CBC PKCS7.This issue affects GSDK: through 4.4.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00298 22nd percentileScored 2026-11-07

Fix Fixed GSDK (silabs.com): 4.4.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
silabs.com	GSDK	before 4.4.0	4.4.0	Patch available	CNA

GSDK Vendorsilabs.com Affected before 4.4.0 Fixed in 4.4.0 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:silabs:gecko_software_development_kit::::::::	up to 4.4.0	Vulnerable	silabs.com

cpe:2.3:a:silabs:gecko_software_development_kit:*:*:*:*:*:*:*:* Versions up to 4.4.0 Vulnerable ·silabs.com

Remediation

Fix · CNA GSDK (silabs.com) Fixed in 4.4.0

Timeline

2026-10-02 Threatist record created from CVE-2023-41097
2026-10-03 Alias added: GHSA-67c4-7f3g-r556

References

Patch 1

https://github.com/SiliconLabs/gecko_sdk/releases

Advisory 1

https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/069Vm0000007rArIAI?operationContext=S1

TI-2023-24288 Heap-based buffer overflow in silabs.com Gecko Platform CVSS 3.1CRITICAL 10.0
TI-2023-14952 Memory corruption in silabs.com Gecko Platform CVSS 3.1CRITICAL 9.8
TI-2023-12925 Memory corruption in silabs.com Gecko Platform CVSS 3.1CRITICAL 9.8
TI-2023-12476 Heap-based buffer overflow in silabs.com Gecko Platform CVSS 3.1CRITICAL 9.8
TI-2023-12937 Memory corruption in silabs.com Gecko Platform CVSS 3.1CRITICAL 9.8
TI-2023-10642 Heap-based buffer overflow in silabs.com Gecko Platform CVSS 3.1CRITICAL 9.8

See all 29 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences