CVE-2026-55392
MEDIUM
NVD
CVSS Score
5.5
Severity
MEDIUM
Published
Jun 18, 2026
Vendor
unknown
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.