CVE-2026-55392

MediumCVSS 5.5/10Last modified Jul 14, 2026

Description

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-1284

Affected software

No affected versions have been published.

Timeline

Published: Jun 18, 2026
Last modified: Jul 14, 2026
NVD status: Deferred

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