{"cve":"CVE-2026-44318","nvd":{"published":"2026-05-27T17:16:36.887","modified":"2026-10-14T20:10:00.190","status":"Analyzed","description":"free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's BSF PUT /nbsf-management/v1/subscriptions/{subId} handler has an unsynchronized write on the global Subscriptions map. The handler first reads the map under RLock() via BSFContext.GetSubscription(subId), but if the subscription does not exist, ReplaceIndividualSubcription() writes back to the same map directly without taking the mutex (bsfContext.BsfSelf.Subscriptions[subId] = subscription). Under concurrent authenticated PUT load, one goroutine can read while another writes the map, which causes the Go runtime to abort the process with fatal error: concurrent map read and map write (Go runtime panics that come from concurrent map access bypass recover() and terminate the process). The BSF container exits with code 2 -- the entire BSF SBI surface goes down until restart. This vulnerability is fixed in 4.2.2.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.3},"cwes":["CWE-362","CWE-820"],"references":["https://github.com/free5gc/bsf/commit/277908565fd628d974a13ef562b81a8b7b519ffa","https://github.com/free5gc/bsf/pull/7","https://github.com/free5gc/free5gc/issues/926","https://github.com/free5gc/free5gc/security/advisories/GHSA-27ph-8q4f-h7m7","https://github.com/free5gc/free5gc/issues/926"],"products":["free5gc:free5gc"],"source":"nvd","synced_at":"2026-10-19T22:36:28.938604137+00:00"},"epss":{"cve":"CVE-2026-44318","score":0.00332,"percentile":0.26173,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-27ph-8q4f-h7m7","url":"https://osv.dev/vulnerability/GHSA-27ph-8q4f-h7m7","summary":"free5GC's BSF concurrent PUT /nbsf-management/v1/subscriptions/{subId} crashes the BSF process via concurrent map read/write on Subscriptions","modified":"2026-06-08T20:15:13.336507170Z","packages":[{"ecosystem":"Go","name":"github.com/free5gc/bsf","purl":"pkg:golang/github.com/free5gc/bsf","ranges":["<1.0.2"],"fixed":["1.0.2"]}]},{"id":"GO-2026-4994","url":"https://osv.dev/vulnerability/GO-2026-4994","summary":"free5GC's BSF concurrent PUT /nbsf-management/v1/subscriptions/{subId} crashes the BSF process via concurrent map read/write on Subscriptions in github.com/free5gc/bsf","modified":"2026-05-20T19:30:13.024844232Z","packages":[{"ecosystem":"Go","name":"github.com/free5gc/bsf","purl":"pkg:golang/github.com/free5gc/bsf","ranges":["<1.0.2"],"fixed":["1.0.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}