littlefs through 2.11.3, when built with LFS_MIGRATE, contains a type confusion vulnerability in lfs_dir_traverse() that treats a stack lfs_diskoff struct as an lfs_attr array. Attackers can supply a crafted littlefs v1 image whose metadata is read as LFS_FROM_USERATTRS during migration, causing out-of-bounds stack reads and process crashes.

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
littlefs-project littlefs unaffected
Version Status Constraints
0 affected ≤ 2.11.3

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Project Subscriptions

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/littlefs-project/littlefs/blob/v2.11.3/lfs.c#L1056-L1063 cve-icon cve-icon
https://github.com/littlefs-project/littlefs/issues/1213 cve-icon cve-icon
https://github.com/sigdevel/pocs/blob/main/res/littlefs/1/1_lfs_dir_traverse_lfs_c_1059.img cve-icon cve-icon
https://www.vulncheck.com/advisories/littlefs-through-2.11.3-type-confusion-in-lfs-dir-traverse-via-lfs-migrate cve-icon cve-icon
History

Sun, 15 Nov 2026 16:00:00 +0000

Type Values Removed Values Added
Description littlefs through 2.11.3, when built with LFS_MIGRATE, contains a type confusion vulnerability in lfs_dir_traverse() that treats a stack lfs_diskoff struct as an lfs_attr array. Attackers can supply a crafted littlefs v1 image whose metadata is read as LFS_FROM_USERATTRS during migration, causing out-of-bounds stack reads and process crashes.
Title littlefs through 2.11.3 Type Confusion in lfs_dir_traverse via lfs_migrate
Weaknesses CWE-843
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 6.8, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-15T15:51:19.031Z

Reserved: 2026-11-15T15:42:35.162Z

Link: CVE-2026-129490

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-15T16:16:56.620

Modified: 2026-11-15T16:16:56.620

Link: CVE-2026-129490

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-15T17:30:09Z

Weaknesses