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CVE-2026-32937— free5GC CHF has Out-of-Bounds Slice Access that Leads to DoS

Quick assessment

Affected
free5gc chf
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

free5GC是free5GC开源的一个第 5 代 (5G) 移动核心网络的开源项目。 free5GC 1.2.2之前版本存在输入验证错误漏洞，该漏洞源于CHF nchf-convergedcharging服务存在越界切片访问，可能导致服务器端内核崩溃和拒绝服务。

AI Predicted 5.3 Difficulty: Easy EPSS 0.55% · P44
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I. Basic Information for CVE-2026-32937

Vulnerability Information
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Vulnerability Title
free5GC CHF has Out-of-Bounds Slice Access that Leads to DoS
Source: CVE Program / CVE List V5
Vulnerability Description
free5GC is an open source 5G core network. free5GC CHF prior to version 1.2.2 has an out-of-bounds slice access vulnerability in the CHF `nchf-convergedcharging` service. A valid authenticated request to PUT `/nchf-convergedcharging/v3/recharging/:ueId?ratingGroup=...` can trigger a server-side panic in `github.com/free5gc/chf/internal/sbi.(*Server).RechargePut(...)` due to an out-of-range slice access. In the reported runtime, Gin recovery converts the panic into HTTP 500, but the recharge path remains remotely panic-triggerable and can be abused repeatedly to degrade recharge functionality and flood logs. In deployments without equivalent recovery handling, this panic may cause more severe service disruption. free5GC CHF patches the issue. Some workarounds are available: Restrict access to the `nchf-convergedcharging` recharge endpoint to strictly trusted NF callers only; apply rate limiting or network ACLs in front of the CHF SBI interface to reduce repeated panic-trigger attempts; if the recharge API is not required, temporarily disable or block external reachability to this route; and/or ensure panic recovery, monitoring, and alerting are enabled.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对数组索引的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
free5GC 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
free5GC是free5GC开源的一个第 5 代 (5G) 移动核心网络的开源项目。 free5GC 1.2.2之前版本存在输入验证错误漏洞，该漏洞源于CHF nchf-convergedcharging服务存在越界切片访问，可能导致服务器端内核崩溃和拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
free5gc chf < 1.2.2 -

II. Public POCs for CVE-2026-32937

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III. Intelligence Information for CVE-2026-32937

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Patches & Fixes for CVE-2026-32937 (2)

Vendor Advisories for CVE-2026-32937 (1)

Other References for CVE-2026-32937 (1)

Same Patch Batch · free5gc · 2026-03-20 · 7 CVEs total

CVE-2026-33062 free5GC NRF Discovery EncodeGroupId Function Panics on Malformed group-id-list Parameter
CVE-2026-33063 free5GC AUSF UE Authentication Panic on Nil SuciSupiMap Interface Conversion
CVE-2026-33064 free5GC UDM DataChangeNotification Procedure Panic Due to Nil Pointer Dereference
CVE-2026-33065 free5GC UDM incorrectly returns 500 for empty supi path parameter in DELETE sdm-subscripti
CVE-2026-33191 free5GC UDM vulnerable to null byte injection in URL path parameters causing 500 Internal
CVE-2026-33192 free5GC UDM incorrectly returns 500 for empty supi path parameter in PATCH sdm-subscriptio

IV. Related Vulnerabilities

Same vendor: free5gc
Same weakness: CWE-129

V. Comments for CVE-2026-32937

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