CVE-2026-82587

Open5GS AMF namf-handler.c amf_namf_comm_decode_ue_mm_context_list memory corruption

State: Published
Severity: 5.3 Medium
Published: Aug 30, 2026
Updated: Aug 31, 2026
Reserved: Aug 30, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P	VulDB
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C	VulDB
3.0	4.3 Medium	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C	VulDB
2.0	4.0 Medium	AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C	VulDB

Weaknesses

CWE-119 Memory Corruption

Affected Products

Product	Versions
Open5GSn/a	2.7.0Affected 2.7.1Affected 2.7.2Affected 2.7.3Affected 2.7.4Affected 2.7.5Affected 2.7.6Affected 2.7.7Affected 2.8.0Not affected

References

VDB-397082 | Open5GS AMF namf-handler.c amf_namf_comm_decode_ue_mm_context_list memory corruptionvdb-entrytechnical-description
VDB-397082 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
CVE-2026-82587 | CVE Analysis and Reportthird-party-advisory
Submit #891890 | Open5gs AMF v2.7.7 Denial of Servicethird-party-advisory
https://github.com/open5gs/open5gs/issues/4398exploitissue-tracking
https://github.com/open5gs/open5gs/commit/abf8a836564b966b5141110fc25ed413c4f17522patch
https://github.com/open5gs/open5gs/releases/tag/v2.8.0patch
https://github.com/open5gs/open5gs/product

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