CVE-2026-108105— Open5GS through 2.8.0 MME Reachable Assertion via GTPv1 SGSN Context Request
Quick assessment
Affected
open5gs open5gs
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 Open5GS 2.8.0 及更早版本中，mme_gn_handle_sgsn_context_request() 函数存在一个可触发的断言（assertion）漏洞，远程未认证攻击者可通过构造恶意的 SGSN 地址信息元素（IEs）使 MME（移动管理实体）崩溃。攻击者若已知用户的 IMSI 或 P-TMSI，可从配置的 SGSN 地址发送 GTPv1-C 流量，并提供无效的地址长度，从而导致 open5gs-mmed 进程终止，进而使所有用户的服务不可用。
Possible ATT&CK Techniques 2 AI
T1190 · Exploit Public-Facing Application T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-108105
Vulnerability Information
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Vulnerability Title
Open5GS through 2.8.0 MME Reachable Assertion via GTPv1 SGSN Context Request
Source: CVE Program / CVE List V5
Vulnerability Description
Open5GS through 2.8.0 contains a reachable assertion vulnerability in mme_gn_handle_sgsn_context_request() that allows remote unauthenticated attackers to crash the MME via malformed SGSN Address IEs. Attackers sending GTPv1-C traffic from a configured SGSN address with a known UE IMSI or P-TMSI can supply an invalid address length to terminate open5gs-mmed, denying service to all subscribers.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可达断言
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-108105
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-108105 (4)
Same Patch Batch · open5gs · 2026-10-09 · 3 CVEs total
| CVE-2026-108102 | 5.3 MEDIUM | Open5GS through 2.8.0 Heap Out-of-Bounds Read via PFCP Volume Measurement IE |
| CVE-2026-108103 | 5.3 MEDIUM | Open5GS through 2.8.0 Heap Out-of-Bounds Read via PFCP Dropped DL Traffic Threshold IE |
IV. Related Vulnerabilities
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CVE-2026-108103
Open5GS through 2.8.0 Heap Out-of-Bounds Read via PFCP Dropp -
CVE-2026-108102
Open5GS through 2.8.0 Heap Out-of-Bounds Read via PFCP Volum -
CVE-2026-107166
Open5GS GTP-U Receive Path gtp-path.c ogs_pfcp_xact_local_cr -
CVE-2026-92417
Open5GS PFCP types.c ogs_pfcp_parse_volume_measurement null -
CVE-2026-92416
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CVE-2026-108102
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Same weakness: CWE-617
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V. Comments for CVE-2026-108105
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