Dashboard / CVE-2026-55392

CVE-2026-55392

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 38/100
Published: 2026-06-18 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Low Complexity No Auth

CVSS Vector Breakdown

AV: Local
AC: Low
PR: None
UI: Active
S: X
AT: None
VC: None
VI: None
VA: High

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 (1)

References & Advisories (2)

Bug Bounty Relevance

38 / 100
✓ No authentication
✓ Low complexity

CVSS Score

6.7 / 10.0 v4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.15%
Raw Score 0.001510
Percentile 4.2%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00151
2026-10-28
0.00151

Intelligence Sources

nvd ref →

External Links