Most recent entries from all

cnvd-2026-37848

2026-10-07T08:15:35.087182+00:00

cnvd-2026-37848

EUVD-2026-323533

2026-10-07T08:15:35.087258+00:00

EUVD-2026-323533

fkie_cve-2026-44323

2026-10-07T08:15:35.087284+00:00

free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's UDR nudr-dr DELETE /subscription-data/{ueId}/{servingPlmnId}/ee-subscriptions/{subsId}/amf-subscriptions handler contains a nil-pointer dereference reachable from a single authenticated request, after one preparatory authenticated EE-subscription create. The handler checks _, ok = UESubsData.EeSubscriptionCollection[subsId] and sets a 404 problem-details on the miss path, but then continues to UESubsData.EeSubscriptionCollection[subsId].AmfSubscriptionInfos -- dereferencing the same missing entry instead of returning. Gin recovery converts the panic into HTTP 500, but the endpoint remains repeatedly panicable. This vulnerability is fixed in 4.2.2.

GHSA-4rqf-grm6-vf75 — free5GC's UDR nudr-dr DELETE amf-subscriptions panics on missing subsId when UE state exists (nil pointer dereference)

2026-10-07T08:15:35.087334+00:00

Affected: Go: github.com/free5gc/udr

### Summary free5GC's UDR `nudr-dr` `DELETE /subscription-data/{ueId}/{servingPlmnId}/ee-subscriptions/{subsId}/amf-subscriptions` handler contains a nil-pointer dereference reachable from a single authenticated request, after one preparatory authenticated EE-subscription create. The handler checks `_, ok = UESubsData.EeSubscriptionCollection[subsId]` and sets a `404` problem-details on the miss path, but then continues to `UESubsData.EeSubscriptionCollection[subsId].AmfSubscriptionInfos` -- dereferencing the same missing entry instead of returning. Gin recovery converts the panic into `HTTP 500`, but the endpoint remains repeatedly panicable.

This endpoint requires a valid `nudr-dr` OAuth2 access token (i.e. PR:L, NOT PR:N), so this is scored as an authenticated panic-DoS, not as an unauth-bypass finding.

### Details Validated against the UDR container in the official Docker compose lab. - Source repo tag: `v4.2.1` - Running Docker image: `free5gc/udr:v4.2.1` - Runtime UDR commit: `754d23b0` - Docker validation date: 2026-03-22 - UDR endpoint: `http://10.100.200.11:8000`

Precondition (one authenticated EE-subscription create allocates UE state): ```go if !ok { udrSelf.UESubsCollection.Store(ueId, new(udr_context.UESubsData)) value, _ = udrSelf.UESubsCollection.Load(ueId) } ... UESubsData.EeSubscriptionCollection[newSubscriptionID] = new(udr_context.EeSubscriptionCollection) ```

Vulnerable handler (delete on amf-subscriptions): the `ok` miss path sets `pd` but do…