What is CVE-2026-31397?

CVE-2026-31397 is a high-severity vulnerability in Linux, classified under NULL Pointer Dereference. CVSS score: 7.8/10. Published 2026-04-03.

How severe is CVE-2026-31397?

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

NULL pointer dereference in Linux

CVE-2026-31397

In the Linux kernel, the following vulnerability has been resolved: mm/huge_memory: fix use of NULL folio in move_pages_huge_pmd() move_pages_huge_pmd() handles UFFDIO_MOVE for both normal THPs and huge zero pages. For the huge zero pag…

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 e3981db444a0a18d350d9f92e3f2e8d489b54211, 6.16, 0
Linux Linux_kernel — versions 7.0

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

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-2026-31397?: CVE-2026-31397 is a high-severity vulnerability in Linux, classified under NULL Pointer Dereference. CVSS score: 7.8/10. Published 2026-04-03.
How severe is CVE-2026-31397?: High severity. CVSS v3 base score is 7.8 out of 10.