Risk Letters

Exploited vulnerability

CVE-2026-31431

TLP:CLEAR

Linux Kernel Incorrect Resource Transfer Between Spheres Vulnerability

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

Facts

  • Vendor: Linux
  • Product: Kernel
  • CVSS: 7.8
  • EPSS (probability of exploitation within 30 days): 98.1 %
  • On CISA's Known Exploited Vulnerabilities list since: 1 May 2026
  • First known exploitation: 1 May 2026
  • CISA's deadline for US federal agencies: 15 May 2026
  • Weakness: CWE-669
  • First seen by Risk Letters: 1 May 2026

Members see which Nordic sectors the flaw hits, and what to do about it.

Get the full brief

Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD