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CVE-2026-55392

MEDIUM
5.5
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-55392
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-06-16 19:44 UTC
Published
2026-06-18 18:00 UTC
Last updated
2026-06-18 18:58 UTC
Primary CWE
CWE-1284
Improper Validation of Specified Quantity in Input
Vendor / Product
nilfs-dev / nilfs-utils
Sources
cve.org  ·  NVD

Severity & Metrics

5.5 MEDIUM CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
nilfs-dev nilfs-utils — 0 ≤ 2.3.0, 26efb5daff0757365101035145331b0a5a85d9d9
Weakness (CWE)
CWESourceDescription
CWE-1284 cna Improper Validation of Specified Quantity in Input
CVSS scores (2)
ScoreSeverityVersionSourceVector
6.7 MEDIUM 4.0 cna 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
5.5 MEDIUM 3.1 cna CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
References (2)
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