DEBIAN-CVE-2026-55392

Source
https://security-tracker.debian.org/tracker/CVE-2026-55392
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55392.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-55392
Upstream
Published
2026-06-18T19:16:23Z
Modified
2026-09-14T17:03:20Z
Severity
  • 6.7 (Medium) CVSS_V4 - 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 CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Debian:12 / nilfs-tools

Package

Name
nilfs-tools
Purl
pkg:deb/debian/nilfs-tools?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.2.9-1
2.2.11-1
2.2.11-2

Ecosystem specific

{
    "urgency": "unimportant"
}

Database specific

source
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55392.json"

Debian:13 / nilfs-tools

Package

Name
nilfs-tools
Purl
pkg:deb/debian/nilfs-tools?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.2.11-2

Ecosystem specific

{
    "urgency": "unimportant"
}

Database specific

source
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55392.json"

Debian:14 / nilfs-tools

Package

Name
nilfs-tools
Purl
pkg:deb/debian/nilfs-tools?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.2.11-2

Ecosystem specific

{
    "urgency": "unimportant"
}

Database specific

source
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55392.json"