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

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Attack vector

Network

Complexity

Low

Privileges

Low

User interaction

None

Confidentiality

None

Integrity

None

Availability

Low

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.5% · higher than 46% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

OP

Open5GS · Open5gs

2.7.0; 2.7.1; 2.7.2; 2.7.3; 2.7.4; 2.7.5; +2 more · source: vendor