{"schemaVersion":3,"id":"CVE-2025-55095","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"The function _ux_host_class_storage_media_mount() is responsible for mounting partitions on a USB mass storage device. When it encounters an extended partition entry in the partition table, it recursively calls itself to mount the next logical partition.\n\nThis recursion occurs in _ux_host_class_storage_partition_read(), which parses up to four partition entries. If an extended partition is found (with type UX_HOST_CLASS_STORAGE_PARTITION_EXTENDED or EXTENDED_LBA_MAPPED), the code invokes:\n            _ux_host_class_storage_media_mount(storage, sector + _ux_utility_long_get(...));\n\n\nThere is no limit on the recursion depth or tracking of visited sectors. As a result, a malicious or malformed disk image can include cyclic or excessively deep chains of extended partitions, causing the function to recurse until stack overflow occurs.","dates":{"published":"2026-01-27T15:34:47.755Z","modified":"2026-01-27T15:58:14.494Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":4.2,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7,"severity":"high","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00165,"percentile":0.05335,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0.018000000000000002,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00147},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00144,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00147,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00147,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00147,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00147,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00147,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00147,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00147,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00147,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00147,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00165,"percentile":0.05335}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00147,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00147,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00147,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00147,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00147,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00165,"percentile":0.05335}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"GITHUB_ECLIPSE-THREADX_USBX","name":"Usbx","source":"github","url":"https://github.com/eclipse-threadx/usbx/security/advisories/GHSA-qfmp-wch9-rpv2","maturity":"poc","reliabilityScore":0.3,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-121","name":"Stack-based Buffer Overflow","description":"A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).","type":"weakness","status":"Draft","abstraction":"Variant","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/121.html"},{"id":"CWE-674","name":"Uncontrolled Recursion","description":"The product does not properly control the amount of recursion that takes place,  consuming excessive resources, such as allocated memory or the program stack.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/674.html"},{"id":"CWE-787","name":"Out-of-bounds Write","description":"The product writes data past the end, or before the beginning, of the intended buffer.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/787.html"}],"affected":[{"vendor":"eclipse foundation","product":"eclipse threadx - usbx","name":"Eclipse ThreadX - USBX","label":"eclipse threadx - usbx","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≤ 6.4.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 6.4.2","eol":null,"hubHref":"/vendor/eclipse_foundation/eclipse_threadx_-_usbx"},{"vendor":"eclipse","product":"threadx_usbx","name":"threadx usbx","label":"threadx_usbx","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≤ 6.4.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 6.4.2","eol":null,"hubHref":"/vendor/eclipse/threadx_usbx"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/eclipse-threadx/usbx/security/advisories/GHSA-qfmp-wch9-rpv2","label":"github.com/eclipse-threadx/usbx/security/advisories/GHSA-qfmp-wch9-rpv2","hostname":"github.com","tags":["Exploit","Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-01-27T15:34:47.755Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-01-27T15:58:14.494Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":38,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T05:57:29.316Z","stale":false,"partial":false}}