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CVE-2026-82587— Open5GS AMF namf-handler.c amf_namf_comm_decode_ue_mm_context_list memory corruption

Quick assessment

Affected
n/a 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是Open5GS组织开源的一套5G核心网络功能软件。 Open5GS 2.7.7及之前版本存在缓冲区错误漏洞，该漏洞源于AMF组件中函数amf_namf_comm_decode_ue_mm_context_list对参数ueContext.mmContextList[*].allowedNssai的错误操作，可能导致内存破坏，攻击者可远程利用。

CVSS 4.3 · Medium EPSS 0.55% · P46

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 9

VendorProduct Version RangeStatus
n/a Open5GS 2.7.0 affected
2.7.1 affected
2.7.2 affected
2.7.3 affected
2.7.4 affected
2.7.5 affected
2.7.6 affected
2.7.7 affected
… +1 more rows
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I. Basic Information for CVE-2026-82587

Vulnerability Information
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Vulnerability Title
Open5GS AMF namf-handler.c amf_namf_comm_decode_ue_mm_context_list memory corruption
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was determined in Open5GS up to 2.7.7. This vulnerability affects the function amf_namf_comm_decode_ue_mm_context_list of the file src/amf/namf-handler.c of the component AMF. This manipulation of the argument ueContext.mmContextList[*].allowedNssai causes memory corruption. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Upgrading to version 2.8.0 is able to resolve this issue. Patch name: abf8a836564b966b5141110fc25ed413c4f17522. It is recommended to upgrade the affected component.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
内存缓冲区边界内操作的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Open5GS 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open5GS是Open5GS组织开源的一套5G核心网络功能软件。 Open5GS 2.7.7及之前版本存在缓冲区错误漏洞，该漏洞源于AMF组件中函数amf_namf_comm_decode_ue_mm_context_list对参数ueContext.mmContextList[*].allowedNssai的错误操作，可能导致内存破坏，攻击者可远程利用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- Open5GS 2.7.0 cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-82587

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III. Intelligence Information for CVE-2026-82587

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Patches & Fixes for CVE-2026-82587 (1)

Security Blog Posts for CVE-2026-82587 (1)

News Coverage for CVE-2026-82587 (1)

Vendor Pages for CVE-2026-82587 (1)

Other References for CVE-2026-82587 (2)

Same Patch Batch · n/a · 2026-08-30 · 5 CVEs total

CVE-2026-82556 6.3 MEDIUM Forgejo Repository Migration is_migrate_allowed.go net.LookupIP server-side request forger
CVE-2026-82590 4.3 MEDIUM Open5GS SMF nudm-handler.c smf_nudm_sdm_handle_get assertion
CVE-2026-82589 4.3 MEDIUM Open5GS N1-N2 Message namf-handler.c amf_namf_comm_handle_n1_n2_message_transfer denial of
CVE-2026-82588 4.3 MEDIUM Open5GS Transfer Endpoint namf-handler.c null pointer dereference

IV. Related Vulnerabilities

Same product: Open5GS
Same vendor: n/a
Same weakness: CWE-119