CVE-2025-70122: free5gc Heap-based Buffer Overflow
Vulnerability summary
CVE-2025-70122 is a high (CVSS 7.5) Heap-based Buffer Overflow vulnerability in free5gc. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 32.5% of scored vulnerabilities. 1 public exploit is recorded.
Timeline
- 13-02-2026PublishedVulnerability first disclosed.
- 13-02-2026Last modifiedVulnerability information updated.
Description
A heap buffer overflow vulnerability in the UPF component of free5GC v4.0.1 allows remote attackers to cause a denial of service via a crafted PFCP Session Modification Request. The issue occurs in the SDFFilterFields.UnmarshalBinary function (sdf-filter.go) when processing a declared length that exceeds the actual buffer capacity, leading to a runtime panic and UPF crash.
CVSS metrics
2 scores · 2 sources · 1 version- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.40%
Chance of exploitation in the next 30 days
Percentile
33%
Versus all other CVEs
30-day change
Increase +0.04 pp
From 0.35% on 22-09-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundFree5Gc
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Free5gc1 product
- free5gc4.0.1
1 vendor · 1 product