Integer overflow in Linux kernel - CVE-2026-97421
Published: September 25, 2026
Vulnerability identifier: #VU152054
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97421
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause incorrect page-size selection.
The vulnerability exists due to integer overflow in ib_umem_find_best_pgsz() in the RDMA/umem subsystem when handling a virtual address and length. A local user can provide values that trigger boundary conditions to cause incorrect page-size selection.
The issue is especially important on 32-bit systems.
Affected software
Linux kernel
How to mitigate CVE-2026-97421
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3