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.
Published: 2026-10-20
Score: 7.8 High
EPSS: n/a
KEV: No
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Remediation

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History

Tue, 20 Oct 2026 13:45:00 +0000

Type Values Removed Values Added
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.
Title FileX fault-tolerant log replay writes past the destination sector when mounting a crafted FAT image
Weaknesses CWE-1284
CWE-787
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: eclipse

Published:

Updated: 2026-10-20T13:10:14.903Z

Reserved: 2026-09-23T13:42:24.320Z

Link: CVE-2026-91041

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-20T14:17:04.350

Modified: 2026-10-20T14:17:04.350

Link: CVE-2026-91041

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-1284

    Improper Validation of Specified Quantity in Input

  • CWE-787

    Out-of-bounds Write