What is CVE-2026-97421?

CVE-2026-97421 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2026-09-24.

How severe is CVE-2026-97421?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Linux

CVE-2026-97421

In the Linux kernel, the following vulnerability has been resolved: RDMA/umem: Be careful about boundary conditions in ib_umem_find_best_pgsz() Several corner cases, especially important on 32 bits: - umem->iova is u64, the function argument should pass in u64 or iova will be truncated - Check that the length is not too large for the iova - Check that lengths > 4G don't overflow the GENMASK

Published 2026-09-24 · last modified 2026-09-25.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Linux

References

Frequently asked questions

What is CVE-2026-97421?: CVE-2026-97421 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2026-09-24.
How severe is CVE-2026-97421?: High severity. CVSS v3 base score is 7.8 out of 10.