What is CVE-2026-31648?

CVE-2026-31648 is a high-severity vulnerability in Linux, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2026-04-24.

How severe is CVE-2026-31648?

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

Integer overflow in Linux

CVE-2026-31648

In the Linux kernel, the following vulnerability has been resolved: mm: filemap: fix nr_pages calculation overflow in filemap_map_pages() When running stress-ng on my Arm64 machine with v7.0-rc3 kernel, I encountered some very strange cr…

Vulnerability class: Integer Overflow

EPSS: 0.001 (2.2th 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 fe601b70eac6cd266e8d7d55030e90a73ed0e339, 743a2753a02e805347969f6f89f38b736850d808, 7.0
Linux Linux_kernel — versions 6.12, 7.0

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

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

Frequently asked questions

What is CVE-2026-31648?: CVE-2026-31648 is a high-severity vulnerability in Linux, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2026-04-24.
How severe is CVE-2026-31648?: High severity. CVSS v3 base score is 7.8 out of 10.