{"id":"CVE-2026-91041","aliases":["EUVD-2026-104999","GHSA-c8cj-fj9j-426v"],"status":"published","title":"FileX fault-tolerant log replay writes past the destination sector when mounting a crafted FAT image","description":"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.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.00164,"percentile":0.05618,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1284","CWE-787"],"published":"2026-10-20T13:10:14Z","modified":"2026-10-28T02:31:10Z","products":[{"vendor":"eclipse foundation","product":"eclipse threadx - filex"}],"references":[{"url":"https://github.com/eclipse-threadx/filex/security/advisories/GHSA-c8cj-fj9j-426v","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91041.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91041","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-91041","title":"FileX fault-tolerant log replay writes past the destination sector when mounting a crafted FAT image","description":"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.","status":"published","published":"2026-10-20T13:10:14.903Z","modified":"2026-10-20T15:30:22.55Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-787","CWE-1284"],"updated_at":"2026-11-02T14:19:52.773089Z"}],"euvd":[{"id":"EUVD-2026-104999","description":"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.","status":"published","published":"2026-10-20T13:10:14Z","modified":"2026-10-20T15:30:22Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:59:43.975979Z"}],"nvd":[{"id":"CVE-2026-91041","description":"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.","status":"published","published":"2026-10-20T14:17:04.35Z","modified":"2026-10-20T19:48:50.25Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-787","CWE-1284"],"updated_at":"2026-11-02T14:13:01.161484Z"}],"osv":[{"id":"CVE-2026-91041","title":"FileX fault-tolerant log replay writes past the destination sector when mounting a crafted FAT image","description":"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.","status":"published","published":"2026-10-20T13:10:14.903Z","modified":"2026-10-28T02:31:10.908594171Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-1284","CWE-787"],"updated_at":"2026-11-02T15:45:20.269367Z"}]}}