What is CVE-2026-31398?

CVE-2026-31398 is a high-severity vulnerability in Linux, classified under Reachable Assertion. CVSS score: 7.8/10. Published 2026-04-03.

How severe is CVE-2026-31398?

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

Vulnerability in Linux

CVE-2026-31398

In the Linux kernel, the following vulnerability has been resolved: mm/rmap: fix incorrect pte restoration for lazyfree folios We batch unmap anonymous lazyfree folios by folio_unmap_pte_batch. If the batch has a mix of writable and non…

EPSS: 0.000 (3.3th percentile) — read the EPSS interpretation.

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.

Affected products

Linux — versions 354dffd29575cdf13154e8fb787322354aa9efc4, 6.15, 0
Linux Linux_kernel — versions 7.0

Weakness classification (CWE)

CWE-617 — Reachable Assertion

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2026-31398?: CVE-2026-31398 is a high-severity vulnerability in Linux, classified under Reachable Assertion. CVSS score: 7.8/10. Published 2026-04-03.
How severe is CVE-2026-31398?: High severity. CVSS v3 base score is 7.8 out of 10.