SB2026052882 - Improper input validation in Linux kernel ext2

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2026052882

SB2026052882 - Improper input validation in Linux kernel ext2

Published: May 28, 2026

Security Bulletin ID SB2026052882
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper input validation (CVE-ID: CVE-2026-46002)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper input validation in ext2_iget() when loading a crafted ext2 filesystem image containing an inode with zero i_nlink, non-zero i_mode, and zero i_dtime. A local user can mount or otherwise present a specially crafted filesystem image to trigger kernel warnings and cause a denial of service.

The issue is triggered when the malformed inode reaches VFS name operations such as unlink, rename, or rmdir.


Remediation

Install update from vendor's website.

References