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1 vulnerability by nilfs-dev

CVE-2026-55392 (GCVE-0-2026-55392)

Vulnerability from cvelistv5 – Published: 2026-06-18 18:00 – Updated: 2026-06-18 18:58 X_Open Source
VLAI
Title
NILFS utilities - Undefined Behavior and Out-of-Memory via Unvalidated s_log_block_size
Summary
NILFS utilities through 2.3.0, fixed in commit 26efb5d, nilfs_sb_is_valid() function fails to validate s_log_block_size field in NILFS2 superblock before bit-shift operations. Attackers supplying crafted NILFS2 images trigger undefined behavior through oversized shifts or out-of-memory conditions, crashing tools like nilfs-tune and dumpseg.
Severity
6.7 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
Impacted products
Vendor Product Version
nilfs-dev nilfs-utils Affected: 0 , ≤ 2.3.0 (semver)
Unaffected: 26efb5daff0757365101035145331b0a5a85d9d9 (git)
Create a notification for this product.
Date Public
2026-06-10 00:00
Credits
Tristan Madani (@TristanInSec)
Show details on NVD website
To clipboard 

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