🛡️ OESA-2026-2840 — nilfs-utils

🟡 CVSS 5.0 — Medium ✅ No Known Exploit OSV
5.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

nilfs-utils security update

Userspace utilities for creating and mounting NILFS v2 filesystems.

Security Fix(es):

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.(CVE-2026-55392)

Affected software

OESA-2026-2840 is recorded against 1 package.

  • nilfs-utils (fixed in 2.2.7-7.oe2003sp4)

Timeline and source

Published on 6 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

www.openeuler.org (Advisory)
nvd.nist.gov (Advisory)

Details

Severity MEDIUM
CVSS Score 5.0
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-07-06
Updated 2026-08-12
Modified 2026-07-06
Fix URL N/A

Affected Packages

Software From version Fixed in
nilfs-utils 2.2.7-7.oe2003sp4

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