TI-2026-76828 Aliases CVE-2026-91041

FileX log replay writes out of bounds on crafted FAT image mount

LOW 35CWE-1284Published 2026-10-20 · Updated 2026-10-20

Key facts

Attack vector: Local
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

Eclipse ThreadX FileX from 0 through 6.5.1.202602 is affected. A missing check on the quantity of log data lets fault-tolerant log replay write past a heap buffer when mounting a crafted FAT image, and the attacker controls both the write position and the value. A local user with no privileges who gets a device to mount such an image can make the write reach the FX_MEDIA driver callback and take control of the instruction pointer. The flaw is classified as CWE-1284 and CWE-787.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00164 5th percentileScored 2026-11-07

Fix Fixed Eclipse ThreadX - FileX (Eclipse Foundation): 6.5.2.202603

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Eclipse Foundation	Eclipse ThreadX - FileX	up to 6.5.1.202602	6.5.2.202603	Patch available	CNA

Eclipse ThreadX - FileX VendorEclipse Foundation Affected up to 6.5.1.202602 Fixed in 6.5.2.202603 Patch available CNA

Remediation

Update Eclipse ThreadX FileX to version 6.5.2.202603 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Fix · CNA Eclipse ThreadX - FileX (Eclipse Foundation) Fixed in 6.5.2.202603

Timeline

2026-10-20 Threatist record created from CVE-2026-91041

References

Other 1

https://github.com/eclipse-threadx/filex/security/advisories/GHSA-c8cj-fj9j-426v

TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
TI-2026-81947 Unauthenticated command injection in Eclipse Che che-machine-exec CVSS 3.1CRITICAL 9.8
TI-2026-13216 CWE-863: ABAC authorization bypass via trailing slash route normalization in Eclipse BaSyx Go Components CVSS 3.1CRITICAL 9.8
TI-2026-06514 Path traversal in Eclipse BaSyx CVSS 3.1CRITICAL 10.0
TI-2026-01382 In the Eclipse Theia Website repository, the GitHub Actions workflow… CVSS 3.1CRITICAL 10.0
TI-2026-74697 Authentication bypass in Eclipse Jetty EthereumAuthenticator CVSS 4.0CRITICAL 9.3

See all 466 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences