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CVE-2026-108103— Open5GS through 2.8.0 Heap Out-of-Bounds Read via PFCP Dropped DL Traffic Threshold IE

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.

Open5GS 2.8.0 及更早版本中存在一个堆越界读取漏洞，位于函数 中。该漏洞允许远程未认证的攻击者通过构造较短的 IE（信息元素）缓冲区，读取超出 IE 边界的数据。攻击者可以向 UPF（用户面功能）的 UDP 8805 端口发送设置了 DLPA（下行链路 PFCP 关联）和 DLBY（下行链路字节计数）标志的 PFCP 会话建立或修改请求，从而导致 UPF 崩溃。

CVSS 5.3 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
open5gs open5gs ≤ 2.8.0 affected
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I. Basic Information for CVE-2026-108103

Vulnerability Information
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Vulnerability Title
Open5GS through 2.8.0 Heap Out-of-Bounds Read via PFCP Dropped DL Traffic Threshold IE
Source: CVE Program / CVE List V5
Vulnerability Description
Open5GS through 2.8.0 contains a heap out-of-bounds read vulnerability in ogs_pfcp_parse_dropped_dl_traffic_threshold() that allows remote unauthenticated attackers to read past IE buffers via short IEs. Attackers can send PFCP Session Establishment or Modification Requests to the UPF on UDP port 8805 with DLPA and DLBY flags set, potentially crashing the UPF.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
open5gs open5gs 0 ~ 2.8.0 -

II. Public POCs for CVE-2026-108103

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III. Intelligence Information for CVE-2026-108103

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Patches & Fixes for CVE-2026-108103 (2)

Vendor Advisories for CVE-2026-108103 (1)

Other References for CVE-2026-108103 (1)

Same Patch Batch · open5gs · 2026-10-09 · 3 CVEs total

CVE-2026-108105 5.9 MEDIUM Open5GS through 2.8.0 MME Reachable Assertion via GTPv1 SGSN Context Request
CVE-2026-108102 5.3 MEDIUM Open5GS through 2.8.0 Heap Out-of-Bounds Read via PFCP Volume Measurement IE

IV. Related Vulnerabilities

Same product: open5gs
Same vendor: open5gs
Same weakness: CWE-125

V. Comments for CVE-2026-108103

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