{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-91041", "assignerOrgId": "e51fbebd-6053-4e49-959f-1b94eeb69a2c", "state": "PUBLISHED", "assignerShortName": "eclipse", "dateReserved": "2026-09-23T13:42:24.320Z", "datePublished": "2026-10-20T13:10:14.903Z", "dateUpdated": "2026-10-20T13:10:14.903Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "e51fbebd-6053-4e49-959f-1b94eeb69a2c", "shortName": "eclipse", "dateUpdated": "2026-10-20T13:10:14.903Z"}, "title": "FileX fault-tolerant log replay writes past the destination sector when mounting a crafted FAT image", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write", "type": "CWE"}]}, {"descriptions": [{"lang": "en", "cweId": "CWE-1284", "description": "CWE-1284 Improper Validation of Specified Quantity in Input", "type": "CWE"}]}], "affected": [{"vendor": "Eclipse Foundation", "product": "Eclipse ThreadX - FileX", "packageName": "FileX", "versions": [{"status": "affected", "version": "0", "lessThanOrEqual": "6.5.1.202602", "versionType": "custom"}, {"status": "unaffected", "version": "6.5.2.202603"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "Mounting an attacker-controlled FAT image with fault tolerance enabled causes an out-of-bounds heap write during log replay. The write is attacker-positioned and attacker-valued, and on a common embedded memory layout it reaches the FX_MEDIA driver callback, giving control of the instruction pointer.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Mounting an attacker-controlled FAT image with fault tolerance enabled causes an out-of-bounds heap write during log replay. The write is attacker-positioned and attacker-valued, and on a common embedded memory layout it reaches the FX_MEDIA driver callback, giving control of the instruction pointer.</p>"}]}], "references": [{"url": "https://github.com/eclipse-threadx/filex/security/advisories/GHSA-c8cj-fj9j-426v"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 7.8, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}}], "credits": [{"lang": "en", "value": "adawn0106", "type": "reporter"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageName": "FileX", "product": "Eclipse ThreadX - FileX", "vendor": "Eclipse Foundation", "versions": [{"lessThanOrEqual": "6.5.1.202602", "status": "affected", "version": "0", "versionType": "custom"}, {"status": "unaffected", "version": "6.5.2.202603"}]}], "source": "emo@eclipse.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Mounting an attacker-controlled FAT image with fault tolerance enabled causes an out-of-bounds heap write during log replay. The write is attacker-positioned and attacker-valued, and on a common embedded memory layout it reaches the FX_MEDIA driver callback, giving control of the instruction pointer."}], "id": "CVE-2026-91041", "lastModified": "2026-10-20T14:17:04.350", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "emo@eclipse.org", "type": "Secondary"}]}, "published": "2026-10-20T14:17:04.350", "references": [{"source": "emo@eclipse.org", "url": "https://github.com/eclipse-threadx/filex/security/advisories/GHSA-c8cj-fj9j-426v"}], "sourceIdentifier": "emo@eclipse.org", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}, {"lang": "en", "value": "CWE-1284"}], "source": "emo@eclipse.org", "type": "Primary"}]}

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