CVE-2026-8250 (GCVE-0-2026-8250)

Vulnerability from cvelistv5 – Published: 2026-05-10 22:45 – Updated: 2026-05-10 22:45
VLAI?
Title
Open5GS SMF n4-build.c smf_n4_build_qos_flow_to_modify_list denial of service
Summary
A vulnerability has been found in Open5GS up to 2.7.7. This affects the function smf_n4_build_qos_flow_to_modify_list of the file /src/smf/n4-build.c of the component SMF. Such manipulation leads to denial of service. The attack can be executed remotely. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Severity ?
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
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:X/RC:R
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:X/RC:R
CWE
Assigner
References
https://vuldb.com/vuln/362547 vdb-entrytechnical-description
https://vuldb.com/vuln/362547/cti signaturepermissions-required
https://vuldb.com/submit/808476 third-party-advisory
https://github.com/open5gs/open5gs/issues/4444 exploitissue-tracking
https://github.com/open5gs/open5gs/ product
Impacted products
Vendor Product Version
n/a Open5GS Affected: 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
    cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*
Credits
FrankLin (VulDB User) VulDB CNA Team
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "SMF"
          ],
          "product": "Open5GS",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "2.7.0"
            },
            {
              "status": "affected",
              "version": "2.7.1"
            },
            {
              "status": "affected",
              "version": "2.7.2"
            },
            {
              "status": "affected",
              "version": "2.7.3"
            },
            {
              "status": "affected",
              "version": "2.7.4"
            },
            {
              "status": "affected",
              "version": "2.7.5"
            },
            {
              "status": "affected",
              "version": "2.7.6"
            },
            {
              "status": "affected",
              "version": "2.7.7"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "FrankLin (VulDB User)"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "VulDB CNA Team"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability has been found in Open5GS up to 2.7.7. This affects the function smf_n4_build_qos_flow_to_modify_list of the file /src/smf/n4-build.c of the component SMF. Such manipulation leads to denial of service. The attack can be executed remotely. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet."
        }
      ],
      "metrics": [
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            "baseSeverity": "MEDIUM",
            "vectorString": "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",
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            "version": "3.0"
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        {
          "cvssV2_0": {
            "baseScore": 4,
            "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR",
            "version": "2.0"
          }
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      ],
      "problemTypes": [
        {
          "descriptions": [
            {
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              "description": "Denial of Service",
              "lang": "en",
              "type": "CWE"
            }
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-10T22:45:10.820Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-362547 | Open5GS SMF n4-build.c smf_n4_build_qos_flow_to_modify_list denial of service",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/vuln/362547"
        },
        {
          "name": "VDB-362547 | CTI Indicators (IOB, IOC, TTP, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/362547/cti"
        },
        {
          "name": "Submit #808476 | Open5gs SMF v2.7.7 Denial of Service",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/808476"
        },
        {
          "tags": [
            "exploit",
            "issue-tracking"
          ],
          "url": "https://github.com/open5gs/open5gs/issues/4444"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/open5gs/open5gs/"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-05-10T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2026-05-10T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-05-10T16:45:20.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "Open5GS SMF n4-build.c smf_n4_build_qos_flow_to_modify_list denial of service"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-8250",
    "datePublished": "2026-05-10T22:45:10.820Z",
    "dateReserved": "2026-05-10T14:40:04.579Z",
    "dateUpdated": "2026-05-10T22:45:10.820Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-8250\",\"sourceIdentifier\":\"cna@vuldb.com\",\"published\":\"2026-05-10T23:16:27.403\",\"lastModified\":\"2026-05-10T23:16:27.403\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability has been found in Open5GS up to 2.7.7. This affects the function smf_n4_build_qos_flow_to_modify_list of the file /src/smf/n4-build.c of the component SMF. Such manipulation leads to denial of service. The attack can be executed remotely. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.\"}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"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\",\"baseScore\":2.1,\"baseSeverity\":\"LOW\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"NONE\",\"vulnIntegrityImpact\":\"NONE\",\"vulnAvailabilityImpact\":\"LOW\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"PROOF_OF_CONCEPT\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L\",\"baseScore\":4.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":2.8,\"impactScore\":1.4}],\"cvssMetricV2\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:S/C:N/I:N/A:P\",\"baseScore\":4.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"SINGLE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":8.0,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-404\"}]}],\"references\":[{\"url\":\"https://github.com/open5gs/open5gs/\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://github.com/open5gs/open5gs/issues/4444\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/submit/808476\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/vuln/362547\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/vuln/362547/cti\",\"source\":\"cna@vuldb.com\"}]}}"
  }
}


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Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.