FKIE_CVE-2026-1976

Vulnerability from fkie_nvd - Published: 2026-02-06 03:15 - Updated: 2026-02-09 15:04
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
A weakness has been identified in Free5GC up to 4.1.0. Affected is the function SessionDeletionResponse of the component SMF. This manipulation causes null pointer dereference. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. It is suggested to install a patch to address this issue.
References
cna@vuldb.comhttps://github.com/free5gc/free5gc/Product
cna@vuldb.comhttps://github.com/free5gc/free5gc/issues/817Exploit, Issue Tracking, Vendor Advisory
cna@vuldb.comhttps://github.com/free5gc/free5gc/issues/817#issue-3832188092Exploit, Issue Tracking, Vendor Advisory
cna@vuldb.comhttps://github.com/free5gc/smf/pull/189Issue Tracking
cna@vuldb.comhttps://vuldb.com/?ctiid.344498Permissions Required, VDB Entry
cna@vuldb.comhttps://vuldb.com/?id.344498Third Party Advisory, VDB Entry
cna@vuldb.comhttps://vuldb.com/?submit.743239Exploit, Third Party Advisory, VDB Entry
Impacted products
Vendor Product Version
free5gc free5gc *
To clipboard 

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              "criteria": "cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "EF0DB381-157B-4D05-B3D3-A2419F1D0E05",
              "versionEndIncluding": "4.1.0",
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          "operator": "OR"
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A weakness has been identified in Free5GC up to 4.1.0. Affected is the function SessionDeletionResponse of the component SMF. This manipulation causes null pointer dereference. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. It is suggested to install a patch to address this issue."
    },
    {
      "lang": "es",
      "value": "Se ha identificado una debilidad en Free5GC hasta la versi\u00f3n 4.1.0. La funci\u00f3n SessionDeletionResponse del componente SMF est\u00e1 afectada. Esta manipulaci\u00f3n causa desreferencia de puntero nulo. El ataque puede llevarse a cabo remotamente. El exploit se ha hecho p\u00fablico y podr\u00eda usarse para ataques. Se sugiere instalar un parche para solucionar este problema."
    }
  ],
  "id": "CVE-2026-1976",
  "lastModified": "2026-02-09T15:04:08.463",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
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        "type": "Secondary",
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          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
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          "scope": "UNCHANGED",
          "userInteraction": "NONE",
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    "cvssMetricV40": [
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          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
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          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
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          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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",
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          "vulnAvailabilityImpact": "LOW",
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          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
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        "source": "cna@vuldb.com",
        "type": "Secondary"
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    ]
  },
  "published": "2026-02-06T03:15:49.503",
  "references": [
    {
      "source": "cna@vuldb.com",
      "tags": [
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      "url": "https://github.com/free5gc/free5gc/"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-404"
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          "lang": "en",
          "value": "CWE-476"
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      "source": "nvd@nist.gov",
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  ]
}


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Taxonomy of the tags.




Sightings

Author Source Type Date

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.