Open5GS SMF gsm-handler.c denial of service
Published May 11, 2026
5.3
MEDIUMCVSS 4.0
EPSS 0.69%
Description
A vulnerability was determined in Open5GS up to 2.7.7. This affects the function gsm_handle_pdu_session_modification_qos_flow_descriptions of the file src/smf/gsm-handler.c of the component SMF. Executing a manipulation of the argument n1SmMsg can lead to denial of service. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. The pull request to fix this issue awaits acceptance.
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
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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:H
1 other source (CVE.org) ▾
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C
AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/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 May 11, 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
May–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.69% (0.00686) | 50.94th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.38% (0.00378) | 29.38th | v5 (v2026.06.15) |
| May 12, 2026 | 0.06% (0.00057) | 17.82th | v4 (v2025.03.14) |
References (6)
- https://github.com/open5gs/open5gs/ product
- https://github.com/open5gs/open5gs/issues/4452 exploitissue-trackingIssue Tracking
- https://github.com/open5gs/open5gs/pull/4513 issue-trackingpatchIssue Tracking
- https://vuldb.com/submit/808489 third-party-advisoryThird Party AdvisoryVDB Entry
- https://vuldb.com/vuln/362585 vdb-entrytechnical-descriptionThird Party AdvisoryVDB Entry
- https://vuldb.com/vuln/362585/cti signaturepermissions-requiredPermissions RequiredVDB Entry
| Link | Providers | Tags |
|---|---|---|
| https://github.com/open5gs/open5gs/ | product | |
| https://github.com/open5gs/open5gs/issues/4452 | exploitissue-trackingIssue Tracking | |
| https://github.com/open5gs/open5gs/pull/4513 | issue-trackingpatchIssue Tracking | |
| https://vuldb.com/submit/808489 | third-party-advisoryThird Party AdvisoryVDB Entry | |
| https://vuldb.com/vuln/362585 | vdb-entrytechnical-descriptionThird Party AdvisoryVDB Entry | |
| https://vuldb.com/vuln/362585/cti | signaturepermissions-requiredPermissions RequiredVDB Entry |
Change history (0)
No recorded changes yet.