Improper input validation in Linux kernel - CVE-2026-89584
Published: September 13, 2026
Vulnerability identifier: #VU149471
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89584
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to compromise confidentiality, integrity, and availability.
The vulnerability exists due to improper input validation in the block-layer bio_iov_iter_get_pages function when building bios from misaligned user-space vectors. A local user can provide misaligned user-space vectors to compromise confidentiality, integrity, and availability.
Affected software
Linux kernel
How to mitigate CVE-2026-89584
Install security update from vendor's repository.