Actively exploited
Listed in CISA’s Known Exploited Vulnerabilities catalog since May 1, 2026.
CVE-2026-31431
Linux Kernel Incorrect Resource Transfer Between Spheres Vulnerability
Added to KEV May 1, 2026
Alert details
- Source feed
- CISA KEV
- CVE ID
- CVE-2026-31431
- CWE
- CWE-669
- Affected products
- Kernel · Linux Kernel · Linux
What happened
Linux Kernel contains an incorrect resource transfer between spheres vulnerability that could allow for privilege escalation.
What it means for your business
Linux Kernel is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2026-31431). Linux Kernel contains an incorrect resource transfer between spheres vulnerability that could allow for privilege escalation. CISA remediation due date: 2026-05-15. If you need help checking exposure, call (864) 335-9223.
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.
CISA due date: May 15, 2026
Sources
Related briefs
Microsoft PowerShell Security Feature Bypass vulnerability
Microsoft PowerShell Security Feature Bypass vulnerability (CVE-2026-70338) was added to Microsoft’s security update guidance. Acknowledgement Updated If you need help checking exposure, call (864) 335-9223.
Microsoft Windows Cross Device Service Elevation of Privilege vulnerability
Microsoft Windows Cross Device Service Elevation of Privilege vulnerability (CVE-2026-66804) was added to Microsoft’s security update guidance. Acknowledgement Updated If you need help checking exposure, call (864) 335-9223.
Windows iSCSI Target Service Remote Code Execution vulnerability
Windows iSCSI Target Service Remote Code Execution vulnerability (CVE-2026-65791) was added to Microsoft’s security update guidance. Acknowledgement Updated If you need help checking exposure, call (864) 335-9223.
Apple macOS Improper Authentication Vulnerability
Apple macOS is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2026-65400). Apple macOS contains an improper authentication vulnerability that could allow an attacker on the network to authenticate to Screen Sharing without valid credentials. CISA remediation due date: 2026-08-21. If you need help checking exposure, call (864) 335-9223.
Need help patching?
PremierePC monitors KEV alerts for managed clients and helps teams prioritize remediation before attackers do.