CVE-2026-31431

Vulnerability details

Linux Kernel contains an incorrect resource transfer between spheres vulnerability that could allow for privilege escalation.

Added to CISA KEV: 2026-05-01

Ransomware campaign use: Unknown

CISA due date: 2026-05-15

Defensive guidance from CISA

"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.