Open5GS AMF namf-handler.c amf_namf_comm_decode_ue_mm_context_list memory corruption
Published Aug 30, 2026
5.3
MEDIUMCVSS 4.0
EPSS 0.55%
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.
Affected products
-
- Version 2.7.0StatusaffectedConstraints-
- Version 2.7.1StatusaffectedConstraints-
- Version 2.7.2StatusaffectedConstraints-
- Version 2.7.3StatusaffectedConstraints-
- Version 2.7.4StatusaffectedConstraints-
- Version 2.7.5StatusaffectedConstraints-
- Version 2.7.6StatusaffectedConstraints-
- Version 2.7.7StatusaffectedConstraints-
- Version 2.8.0StatusunaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
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
1 other source (NVD) ▾
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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
1 other source (NVD) ▾
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
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
AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C
1 other source (NVD) ▾
AV:N/AC:L/Au:S/C:N/I:N/A:P
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Aug 31, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
Aug–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.55% (0.00545) | 43.72th | v5 (v2026.06.15) |
| Aug 31, 2026 | 0.31% (0.00310) | 23.25th | v5 (v2026.06.15) |
References (8)
- https://github.com/open5gs/open5gs/ product
- https://github.com/open5gs/open5gs/commit/abf8a836564b966b5141110fc25ed413c4f17522 patch
- https://github.com/open5gs/open5gs/issues/4398 exploitissue-tracking
- https://github.com/open5gs/open5gs/releases/tag/v2.8.0 patch
- https://vuldb.com/cve/CVE-2026-82587 third-party-advisory
- https://vuldb.com/submit/891890 third-party-advisory
- https://vuldb.com/vuln/397082 vdb-entrytechnical-description
- https://vuldb.com/vuln/397082/cti signaturepermissions-required
| Link | Providers | Tags |
|---|---|---|
| https://github.com/open5gs/open5gs/ | product | |
| https://github.com/open5gs/open5gs/commit/abf8a836564b966b5141110fc25ed413c4f17522 | patch | |
| https://github.com/open5gs/open5gs/issues/4398 | exploitissue-tracking | |
| https://github.com/open5gs/open5gs/releases/tag/v2.8.0 | patch | |
| https://vuldb.com/cve/CVE-2026-82587 | third-party-advisory | |
| https://vuldb.com/submit/891890 | third-party-advisory | |
| https://vuldb.com/vuln/397082 | vdb-entrytechnical-description | |
| https://vuldb.com/vuln/397082/cti | signaturepermissions-required |
Change history (0)
No recorded changes yet.