SB2026092530 - Integer overflow in Linux kernel rdma
Published: September 25, 2026
Security Bulletin ID
SB2026092530
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Integer overflow (CVE-ID: CVE-2026-97421)
CWE-ID: CWE-190 - Integer overflow
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.