{"id":"CVE-2026-91041","summary":"FileX fault-tolerant log replay writes past the destination sector when mounting a crafted FAT image","details":"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.","aliases":["GHSA-c8cj-fj9j-426v"],"modified":"2026-10-21T03:00:11.435557019Z","published":"2026-10-20T13:10:14.903Z","database_specific":{"cna_assigner":"eclipse","cwe_ids":["CWE-1284","CWE-787"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91041.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91041.json"},{"type":"ADVISORY","url":"https://github.com/eclipse-threadx/filex/security/advisories/GHSA-c8cj-fj9j-426v"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91041"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/eclipse-threadx/filex","events":[{"introduced":"0"},{"last_affected":"b93ac4ae77ee12196f15f341cffb0a9810d2484f"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"0"},{"last_affected":"6.5.1.202602"}],"source":"AFFECTED_FIELD","strategy":"StandardRange"}]}}],"versions":["v6.4.1_rel","v6.5.1.202602_rel","v6.5.0.202601_rel","v6.4.5.202504_rel","v6.4.2.202503_rel"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-91041.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}