CVE-2026-71676: n/a
CVE-2026-71676 is a buffer overflow vulnerability in Open5GS version 2.7.0. It allows a remote attacker to cause a denial of service by exploiting the NAS 5GS decoder chain when the message type byte of a NAS PDU is mutated. This vulnerability does not impact confidentiality or integrity but can disrupt availability.
AI Analysis
Technical Summary
This vulnerability involves a buffer overflow in Open5GS v2.7.0 triggered by a mutated message type byte in the NAS PDU during decoding in the NAS 5GS decoder chain. Exploitation leads to denial of service conditions. The CVSS 3.1 base score is 7.5, indicating high severity, with an attack vector of network (remote), no privileges required, and no user interaction needed. There is no indication of confidentiality or integrity impact.
Potential Impact
An attacker can remotely cause a denial of service on Open5GS v2.7.0 by sending a specially crafted NAS PDU with a mutated message type byte. This results in a buffer overflow in the NAS 5GS decoder chain, disrupting service availability. There is no impact on confidentiality or integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch information is provided at this time. Until a patch is available, consider monitoring for unusual NAS PDU messages and applying network-level protections to limit exposure.
CVE-2026-71676: n/a
Description
CVE-2026-71676 is a buffer overflow vulnerability in Open5GS version 2.7.0. It allows a remote attacker to cause a denial of service by exploiting the NAS 5GS decoder chain when the message type byte of a NAS PDU is mutated. This vulnerability does not impact confidentiality or integrity but can disrupt availability.
CVSS v3.1
Score 7.5high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a buffer overflow in Open5GS v2.7.0 triggered by a mutated message type byte in the NAS PDU during decoding in the NAS 5GS decoder chain. Exploitation leads to denial of service conditions. The CVSS 3.1 base score is 7.5, indicating high severity, with an attack vector of network (remote), no privileges required, and no user interaction needed. There is no indication of confidentiality or integrity impact.
Potential Impact
An attacker can remotely cause a denial of service on Open5GS v2.7.0 by sending a specially crafted NAS PDU with a mutated message type byte. This results in a buffer overflow in the NAS 5GS decoder chain, disrupting service availability. There is no impact on confidentiality or integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch information is provided at this time. Until a patch is available, consider monitoring for unusual NAS PDU messages and applying network-level protections to limit exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-08-07T00:00:00.000Z
- State
- PUBLISHED
Threat ID: 6a84baf7c6e8be0332afda0f
Added to database: 08/18/2026, 20:05:11 UTC
Last enriched: 09/11/2026, 21:02:08 UTC
Last updated: 10/03/2026, 14:46:10 UTC
Views: 53
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