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CVE-2026-94043— Free5GC Gmm handler.go race condition

Quick assessment

Affected
n/a Free5GC
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 Free5GC 4.2.3 及更早版本中发现了一个漏洞。该漏洞影响了 Gmm Handler 组件中 /corefuzzer_deps/free5gc/NFs/amf/internal/gmm/handler.go 文件的未知代码。此漏洞会导致竞态条件（race condition）。攻击者可远程发起该攻击。修复补丁编号为：e323b01464355781b8b8d5dd695e05cbc00a62f2。建议部署该补丁以修复此问题。

CVSS 5.3 · Medium

Affected Version Matrix 4

VendorProduct Version RangeStatus
n/a Free5GC 4.2.0 affected
4.2.1 affected
4.2.2 affected
4.2.3 affected
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I. Basic Information for CVE-2026-94043

Vulnerability Information
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Vulnerability Title
Free5GC Gmm handler.go race condition
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was determined in Free5GC up to 4.2.3. This vulnerability affects unknown code of the file /corefuzzer_deps/free5gc/NFs/amf/internal/gmm/handler.go of the component Gmm Handler. This manipulation causes race condition. The attack can be initiated remotely. Patch name: e323b01464355781b8b8d5dd695e05cbc00a62f2. To fix this issue, it is recommended to deploy a patch.
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
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
- Free5GC 4.2.0 cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-94043

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III. Intelligence Information for CVE-2026-94043

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Patches & Fixes for CVE-2026-94043 (2)

Other References for CVE-2026-94043 (3)

Other References for CVE-2026-94043 (1)

Same Patch Batch · n/a · 2026-09-20 · 5 CVEs total

CVE-2026-93962 8.3 HIGH Kamailio CDP Diameter Receiver receiver.c shm_malloc heap-based overflow
CVE-2026-94004 7.3 HIGH DedeCMS mytag_js.php code injection
CVE-2026-93960 4.3 MEDIUM Pixelfed OAuth Scope ApiV1Controller.php instancePeers missing authentication
CVE-2026-94030 3.1 LOW SerenityOS LibGfx BMPLoader.cpp decode_bmp_pixel_data integer overflow

IV. Related Vulnerabilities

Same product: Free5GC
Same vendor: n/a
Same weakness: CWE-362

V. Comments for CVE-2026-94043

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