5.5 CVE-2026-55392

Enriched by CISA
 

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.
https://nvd.nist.gov/vuln/detail/CVE-2026-55392

Categories

CWE-1284 : Improper Validation of Specified Quantity in Input
The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties. Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.) ATM simulator does not check for negative values with deposits or withdrawals, allowing attackers to increase their balance Chain: Javascript engine code does not perform a length check (CWE-1284) leading to integer overflow (CWE-190) causing allocation of smaller buffer than expected (CWE-131) resulting in a heap-based buffer overflow (CWE-122) Chain: Python library does not limit the resources used to process images that specify a very large number of bands (CWE-1284), leading to excessive memory consumption (CWE-789) or an integer overflow (CWE-190). lack of validation of length field leads to infinite loop lack of validation of string length fields allows memory consumption or buffer over-read

References


 

AFFECTED (from MITRE)

Vendor Product Versions
nilfs-dev nilfs-utils
  • ≤ 2.3.0 [affected]
  • 26efb5daff0757365101035145331b0a5a85d9d9 [unaffected]
© 2022 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.

CPE

cpe start end

REMEDIATION


EXPLOITS

Exploit-db.com

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POC Github

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Other Nist (github, ...)

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CAPEC

Common Attack Pattern Enumerations and Classifications

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No entry