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 · last modified .

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

EPSS: 0.001 (2.6th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 2.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-97421: held from 0.001 to 0.001.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

  • Linux — versions 5.10, 488229b7729d7becf4c39c5e74fb709fb35115c2, 59f07434b297e2268f5d5c567db5b09145245cf1

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.