CVE Explorer
CVE-2026-33063
free5GC is an open source 5G core network. free5GC AUSF prior to version 1.4.2 has is an Improper Null Check vulnerability leading to Denial of Service. All deployments of free5GC v4.0.1 using the AUSF UE authentication service (`/nausf-auth/v1/ue-authentications` endpoint) are affected. A remote attacker can cause the AUSF service to panic and crash by sending a crafted UE authentication request that triggers a nil interface conversion in the `GetSupiFromSuciSupiMap` function. This results in c
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"ausf","vendor":"free5gc","versions":[{"status":"affected","version":"< 1.4.2"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:b1abe454553d3e73a2ad0708f4af232e9e689906d0967d9ef02812b3530d15c9 · sha256:40cde2cf90b2aff5… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:b1abe454553d3e73a2ad0708f4af232e9e689906d0967d9ef02812b3530d15c9 · sha256:40cde2cf90b2aff5… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-476","description":"CWE-476: NULL Pointer Dereference","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:b1abe454553d3e73a2ad0708f4af232e9e689906d0967d9ef02812b3530d15c9 · sha256:40cde2cf90b2aff5… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"name":"https://github.com/free5gc/ausf/commit/3b9ac4403c2756dc89a5ed3cdcefe688458588aa","tags":["x_refsource_MISC"],"url":"https://github.com/free5gc/ausf/commit/3b9ac4403c2756dc89a5ed3cdcefe688458588aa"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:b1abe454553d3e73a2ad0708f4af232e9e689906d0967d9ef02812b3530d15c9 · sha256:40cde2cf90b2aff5… · /containers/cna/references/3
{"name":"https://github.com/free5gc/ausf/pull/52","tags":["x_refsource_MISC"],"url":"https://github.com/free5gc/ausf/pull/52"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:b1abe454553d3e73a2ad0708f4af232e9e689906d0967d9ef02812b3530d15c9 · sha256:40cde2cf90b2aff5… · /containers/cna/references/2
{"name":"https://github.com/free5gc/free5gc/issues/778","tags":["x_refsource_MISC"],"url":"https://github.com/free5gc/free5gc/issues/778"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:b1abe454553d3e73a2ad0708f4af232e9e689906d0967d9ef02812b3530d15c9 · sha256:40cde2cf90b2aff5… · /containers/cna/references/1
{"name":"https://github.com/free5gc/free5gc/security/advisories/GHSA-4jrw-92fg-4jwx","tags":["x_refsource_CONFIRM"],"url":"https://github.com/free5gc/free5gc/security/advisories/GHSA-4jrw-92fg-4jwx"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:b1abe454553d3e73a2ad0708f4af232e9e689906d0967d9ef02812b3530d15c9 · sha256:40cde2cf90b2aff5… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.