{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-1679", "assignerOrgId": "e2e69745-5e70-4e92-8431-deb5529a81ad", "state": "PUBLISHED", "assignerShortName": "zephyr", "dateReserved": "2026-01-30T05:53:41.457Z", "datePublished": "2026-03-27T23:21:18.399Z", "dateUpdated": "2026-03-27T23:21:18.399Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "packageName": "Zephyr", "product": "Zephyr", "repo": "https://github.com/zephyrproject-rtos/zephyr", "vendor": "zephyrproject-rtos", "versions": [{"lessThanOrEqual": "4.3", "status": "affected", "version": "*", "versionType": "git"}]}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "net: eswifi socket send payload length not bounded"}], "value": "The eswifi socket offload driver copies user-provided payloads into a fixed buffer without checking available space; oversized sends overflow `eswifi->buf`, corrupting kernel memory (CWE-120). Exploit requires local code that can call the socket send API; no remote attacker can reach it directly."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-120", "description": "Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "e2e69745-5e70-4e92-8431-deb5529a81ad", "shortName": "zephyr", "dateUpdated": "2026-03-27T23:21:18.399Z"}, "references": [{"url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-qx3g-5g22-fq5w"}], "source": {"discovery": "UNKNOWN"}, "title": "net: eswifi socket send payload length not bounded", "x_generator": {"engine": "Vulnogram 0.1.0-dev"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "The eswifi socket offload driver copies user-provided payloads into a fixed buffer without checking available space; oversized sends overflow `eswifi->buf`, corrupting kernel memory (CWE-120). Exploit requires local code that can call the socket send API; no remote attacker can reach it directly."}], "id": "CVE-2026-1679", "lastModified": "2026-03-30T13:26:07.647", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.5, "source": "vulnerabilities@zephyrproject.org", "type": "Secondary"}]}, "published": "2026-03-28T00:16:04.740", "references": [{"source": "vulnerabilities@zephyrproject.org", "url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-qx3g-5g22-fq5w"}], "sourceIdentifier": "vulnerabilities@zephyrproject.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-120"}], "source": "vulnerabilities@zephyrproject.org", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,4.3]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Zephyr", "source": "cna", "vendor": "zephyrproject-rtos"}, "product": "zephyr", "vendor": "zephyrproject-rtos"}], "analysis": {"en": {"generated_at": "2026-03-28T05:09:02.462532+00:00", "value": {"mitigation_remediation": ["Apply the latest Zephyr patch that resolves the buffer overflow in the eswifi socket driver", "Verify the applied patch by rebuilding the kernel and checking that socket send operations no longer overflow"], "summary": {"action": "Immediate patch", "impact": "Kernel memory corruption"}, "threat_synthesis": {"affected_systems": "The flaw affects the Zephyr RTOS, specifically the eswifi socket offload driver. No exact release or version information is supplied in the advisory, but all builds containing the vulnerable driver are potentially impacted.", "description_and_impact": "The eswifi socket offload driver copies user\u2011provided payloads into a fixed buffer without enforcing a length check. An oversized send request overflows the driver\u2019s internal buffer, corrupting kernel memory and potentially allowing escalation of privileges or system instability. The vulnerability stems from a buffer overrun weakness (CWE\u2011120).", "risk_and_exploitability": "The CVSS score of 7.3 marks this as a high\u2011severity issue, yet exploitation requires local code that can invoke the socket send API; remote attackers cannot reach this directly without additional vector. Due to the lack of EPSS data and absence from the CISA KEV catalog, the likelihood of widespread exploitation is uncertain, though the high severity means it should be addressed promptly."}}}}, "created": "2026-03-29T20:29:23.985225+00:00", "updated": "2026-03-30T06:59:52.612145+00:00", "vendors": ["zephyrproject-rtos", "zephyrproject-rtos$PRODUCT$zephyr"]}