CRITICAL 9.3 Microsoft

CVE-2025-10263

ARM: CVE-2025-10263 Completion of affected memory accesses might not be guaranteed by completion of a TLBI [kernel]

Microsoft Security Update 2026-Jun: ARM: CVE-2025-10263 Completion of affected memory accesses might not be guaranteed by completion of a TLBI [kernel]

Affected Products

Windows 11 Version 26H1 for ARM64-based Systems
Windows 10 Version 21H2 for ARM64-based Systems
Windows 10 Version 22H2 for ARM64-based Systems
Windows 11 Version 25H2 for ARM64-based Systems
Windows 11 Version 23H2 for ARM64-based Systems
Windows 11 Version 24H2 for ARM64-based Systems

Remediation

$ sudo apt install --only-upgrade linux-kernel

References

Published: 2026-06-09 · Source: Microsoft · Feed updated: 2026-09-18

This critical severity vulnerability with a CVSS score of 9.3 was published on 2026-06-09 via Microsoft. A remediation command is available below. Affected: Windows 11 Version 26H1 for ARM64-based Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 22H2 for ARM64-based Systems and 3 more.

Risk Timeline

CVE Disclosed2026-06-09 · 100 days ago

Remediation Resources

Official Advisory

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-10263

NVD / MITRE

nvd.nist.gov/vuln/detail/CVE-2025-10263

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