#VU124180 Type conversion in Linux kernel - CVE-2026-23265
Published: March 20, 2026
Vulnerability identifier: #VU124180
Vulnerability risk: 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-2026-23265
CWE-ID: CWE-704
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 the f2fs file system's node footer handling when processing node pages with corrupted footers. A local user can provide a specially crafted f2fs image containing corrupted node page footers to cause a denial of service.
Exploitation requires access to a fuzzed or malicious f2fs image and the ability to trigger asynchronous node page reads, such as via f2fs_ra_node_pages(). The system must load and process the corrupted node page, which later triggers a kernel BUG during writeback.
Remediation
Install security update from vendor's repository.