CVE-2026-31431

CISA description

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

Required action

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

Notes & references

• https://lore.kernel.org/linux-cve-announce/2026042214-CVE-2026-31431-3d65@gregkh/
• https://xint.io/blog/copy-fail-linux-distributions#the-fix-6
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/about/
• https://nvd.nist.gov/vuln/detail/CVE-2026-31431

Where this lands in 800-53

Vulnerability data triggers these controls during assessment and continuous monitoring.

• RA-5 · Vulnerability Monitoring and Scanning
• SI-2 · Flaw Remediation
• CM-6 · Configuration Settings
• SI-7 · Software, Firmware, and Information Integrity
• CM-8 · System Component Inventory

External lookups

• NVD · CVE-2026-31431
• CVE.org · CVE-2026-31431
• CISA KEV catalog (canonical)