VULNERABILITY INTELLIGENCE
CVE-2026-55392
CVSS score5.5 MEDIUM
EPSS probability0.15%
CISA KEVNot currently listed
Published2026-06-18
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
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.
Weakness classification
- disclosure@vulncheck.com: CWE-1284