Improper Validation of Array Index Affecting github.com/free5gc/nas/nastype package, versions <1.2.3
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published16 Feb 2026
- disclosed13 Feb 2026
- creditzfei10990-cmd
Introduced: 13 Feb 2026
CVE-2025-70121 (opens in a new tab)How to fix?
Upgrade github.com/free5gc/nas/nasType to version 1.2.3 or higher.
Overview
Affected versions of this package are vulnerable to Improper Validation of Array Index via the GetSUCI function when processing a crafted 5GS Mobile Identity in a NAS Registration Request message. An attacker can cause a crash of the AMF component by sending a specially crafted message that triggers an out-of-bounds array access.