AMF crash via unbounded slice-array copy
Published May 1, 2026 · Updated May 1, 2026
A fixed-size array overflow in Open5GS AMF 2.7.0 through 2.7.7 allows remote authenticated users to crash the AMF during UE registration. The amf_nudm_sdm_handle_provisioned function copies untrusted defaultSingleNssais entries into an eight-element amf_ue slice array without checking the list length. Reachability requires a UE registration that makes AMF import an oversized UDM am-data response; the corrupted state then terminates open5gs-amfd with an assertion abort.
Summary
What happened
A fixed-size array overflow in Open5GS AMF 2.7.0 through 2.7.7 allows remote authenticated users to crash the AMF during UE registration. The amf_nudm_sdm_handle_provisioned function copies untrusted defaultSingleNssais entries into an eight-element amf_ue slice array without checking the list length. Reachability requires a UE registration that makes AMF import an oversized UDM am-data response; the corrupted state then terminates open5gs-amfd with an assertion abort.
The record
- CVE
- CVE-2026-7585
- Published
- May 1, 2026
- Updated
- May 1, 2026
- Vendor
- Open5GS
- Product
- Open5GS
- Classifications
- CWE-404, T1499
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 1, 2026CVE publishedPublication date reported by the CVE source.
- May 1, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=2.7.0
- Affected versionversion=2.7.1
- Affected versionversion=2.7.2
- Affected versionversion=2.7.3
- Affected versionversion=2.7.4
- Affected versionversion=2.7.5
- Affected versionversion=2.7.6
- Affected versionversion=2.7.7
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- AMF oversized defaultSingleNssais reproductionproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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