{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-56117", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-06-18T19:15:10.651Z", "datePublished": "2026-06-23T16:14:31.918Z", "dateUpdated": "2026-06-23T16:14:31.918Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-06-23T16:14:31.918Z"}, "title": "dhcpcd Heap Use-After-Free via Control Socket Handling", "descriptions": [{"lang": "en", "value": "dhcpcd through 10.3.2, fixed in commit 78ea09e, contains a heap use-after-free vulnerability in the control socket handling within src/control.c that allows local unprivileged attackers to trigger memory corruption when privilege separation is disabled. Attackers can connect to the control socket and send a privileged command such as -x, causing control_recvdata() to free the client object while the same READ+HANGUP event subsequently reaches control_hangup() with the stale pointer, resulting in a use-after-free condition exploitable in deployments using --disable-privsep or where privsep initialization has failed with the control socket operating in mode 0666."}], "tags": ["x_open-source"], "datePublic": "2026-06-22T00:00:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-416", "description": "Use After Free", "type": "CWE"}]}], "affected": [{"defaultStatus": "affected", "vendor": "NetworkConfiguration", "product": "dhcpcd", "repo": "https://github.com/NetworkConfiguration/dhcpcd", "versions": [{"status": "affected", "version": "0", "versionType": "semver", "lessThanOrEqual": "10.3.2"}, {"status": "unaffected", "version": "78ea09ed1633a583dbcde6e7bab9df4639ec8a34", "versionType": "git"}]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 5.7, "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "version": "3.1", "baseSeverity": "MEDIUM", "baseScore": 4.7, "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"}}], "references": [{"url": "https://github.com/NetworkConfiguration/dhcpcd/commit/78ea09ed1633a583dbcde6e7bab9df4639ec8a34", "tags": ["patch"]}, {"url": "https://www.vulncheck.com/advisories/dhcpcd-heap-use-after-free-via-control-socket-handling", "tags": ["third-party-advisory"]}], "credits": [{"lang": "en", "value": "CuB3y0nd", "type": "finder"}, {"lang": "en", "value": "VulnCheck", "type": "finder"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "vulncheck"}}}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,10.3.2]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "code_commit", "value": "78ea09ed1633a583dbcde6e7bab9df4639ec8a34"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "dhcpcd", "source": "cna", "vendor": "NetworkConfiguration"}, "product": "dhcpcd", "vendor": "networkconfiguration"}], "created": "2026-06-23T19:30:04.664037+00:00", "updated": "2026-06-23T21:02:45.316701+00:00", "vendors": ["networkconfiguration", "networkconfiguration$PRODUCT$dhcpcd"]}