Improper input validation in Linux kernel - CVE-2026-43209
Published: May 7, 2026
Vulnerability identifier: #VU130523
CSH Severity: Low
CVSSv4.0: 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
CVE-ID: CVE-2026-43209
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper input validation in minix_check_superblock() when mounting a crafted minix filesystem image. A local user can supply a malformed filesystem image with invalid superblock fields to cause a denial of service.
Remediation
Install security update from vendor's repository.
External links
- https://git.kernel.org/stable/c/1efc128ee4adbc23e082715425ff895449d233bc
- https://git.kernel.org/stable/c/2bb588cede1c1969e49c0a2822c8cb8b346b7682
- https://git.kernel.org/stable/c/31fefc18096cdc5549cfa54964d90e0b3229aedc
- https://git.kernel.org/stable/c/66c7c239c65341f99ae388d4d53dc9df2bcb9925
- https://git.kernel.org/stable/c/8c97a6ddc95690a938ded44b4e3202f03f15078c
- https://git.kernel.org/stable/c/a051ecf5c5b0387840dc210413ed3bc7fbdaa69c
- https://git.kernel.org/stable/c/d791c544efd6b9c944b43cf7f502e5bcb02fb941
- https://git.kernel.org/stable/c/f57ccd4657c7f082dc47e5b9e18a883bb5f9118f