Pre-auth heap out-of-bounds read in the AMF NAS 5GS mobile-identity handler

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Summary

CVECVE-2026-15720
StatePUBLISHED
Assignerredhat-cnalr
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-14 19:16:51 UTC
Updated2026-07-15 20:58:48 UTC
DescriptionIn Open5GS through version 2.7.7 a pre-authentication heap out-of-bounds read in the AMF NAS 5GS mobile-identity handler may result in subscriber-wide denial of service.

Risk And Classification

Primary CVSS: v3.1 8.6 HIGH from 74b3a70d-cca6-4d34-9789-e83b222ae3be

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS: 0.003710000 probability, percentile 0.294780000 (date 2026-07-20)

Problem Types: CWE-125 | CWE-125 CWE-125 Out-of-bounds read

VersionSourceTypeScoreSeverityVector
3.174b3a70d-cca6-4d34-9789-e83b222ae3beSecondary8.6HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
3.1CNACVSS8.6HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Open5gs Open5gs affected 2.7.7 semver Not specified

References

ReferenceSourceLinkTags
github.com/open5gs/open5gs/security/advisories/GHSA-f4mx-3x6p-cfwp 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
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