CVE-2026-2062

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This affects the function sgwc_s5c_handle_modify_bearer_response/sgwc_sxa_handle_session_modification_response of the component PGW S5U Address Handler. The manipulation leads to null pointer dereference. The attack can be initiated remotely. The exploit is publicly available and might be used. The identifier of the patch is f1bbd7b57f831e2a070780a7d8d5d4c73babdb59. Applying a patch is the recommended action to fix this issue."}, {"lang": "es", "value": "Se identific\u00f3 una vulnerabilidad en Open5GS hasta la versi\u00f3n 2.7.6. Esto afecta a la funci\u00f3n sgwc_s5c_handle_modify_bearer_response/sgwc_sxa_handle_session_modification_response del componente PGW S5U Address Handler. La manipulaci\u00f3n conduce a una desreferencia de puntero nulo. El ataque puede iniciarse de forma remota. El exploit est\u00e1 disponible p\u00fablicamente y podr\u00eda ser utilizado. El identificador del parche es f1bbd7b57f831e2a070780a7d8d5d4c73babdb59. Aplicar un parche es la acci\u00f3n recomendada para solucionar este problema."}], "id": "CVE-2026-2062", "lastModified": "2026-06-17T10:30:13.347", "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"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "cna@vuldb.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.5, "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", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@vuldb.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-2062", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-02-06T19:05:26.021323Z", "version": "2.0.3"}}]}, "published": "2026-02-06T19:16:10.750", "references": [{"source": "cna@vuldb.com", "tags": ["Product"], "url": "https://github.com/open5gs/open5gs/"}, {"source": "cna@vuldb.com", "tags": ["Patch"], "url": "https://github.com/open5gs/open5gs/commit/f1bbd7b57f831e2a070780a7d8d5d4c73babdb59"}, {"source": "cna@vuldb.com", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"], "url": "https://github.com/open5gs/open5gs/issues/4257"}, {"source": "cna@vuldb.com", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"], "url": "https://github.com/open5gs/open5gs/issues/4257#issue-3787701521"}, {"source": "cna@vuldb.com", "tags": ["Permissions Required", "VDB Entry"], "url": "https://vuldb.com/?ctiid.344622"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?id.344622"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?submit.744719"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-404"}, {"lang": "en", "value": "CWE-476"}], "source": "cna@vuldb.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{"analysis": {"en": {"generated_at": "2026-04-17T22:34:39.002429+00:00", "value": {"mitigation_remediation": ["Apply the Open5GS patch associated with commit f1bbd7b57f831e2a070780a7d8d5d4c73babdb59, which releases the PGW S5U handler from the dereference bug. ", "Upgrade to Open5GS 2.7.7 or later to ensure all related fixes and security enhancements are present. ", "Configure network segmentation or firewall rules to limit S5U traffic to trusted PGW peers, preventing unauthorized traffic that could trigger the bug until a patch is in place."], "summary": {"action": "Immediate Patch", "impact": "Remote Denial of Service"}, "threat_synthesis": {"affected_systems": "All Open5GS deployments up to version 2.7.6 are affected. The vulnerability is present in the PGW service that handles S5U traffic and is triggered by the sgwc_sxa_handle_session_modification_response routine. This includes any publicly accessible instance that processes LTE or 5G bearer modification responses.\n", "description_and_impact": "A null pointer dereference flaw exists in the PGW S5U address handler of Open5GS, specifically in the session modification response processing. The vulnerability allows a remote attacker to send crafted network messages that trigger a crash of the affected component. The impact is service interruption, as the component will fail and potentially affect the entire network function. The flaw is rated 6.9 on the CVSS scale and is catalogued as CWE\u2011476 and CWE\u2011404.", "risk_and_exploitability": "The EPSS score for this issue is below 1\u202f%, indicating a low probability of exploitation, but public proof\u2011of\u2011concept code has been released and the exploit is actively available. Because the attack vector is remote and does not require local user interaction, it can be launched from outside the network. While the flaw does not grant code execution, it can still degrade network availability and may be used as part of a larger denial\u2011of\u2011service campaign. The vulnerability is not yet listed in the CISA KEV catalog."}}}}, "created": "2026-02-09T10:50:13.699983+00:00", "updated": "2026-04-17T22:45:29.920026+00:00", "vendors": ["open5gs", "open5gs$PRODUCT$open5gs"]}