Memory Management Vulnerability in Arm CPUs
CVE-2025-0647

7.9HIGH

Key Information:

Vendor

Arm
Status
Neoverse-n2
Neoverse-v3ae
Neoverse-v3
Neoverse-v2
Vendor
CVE Published:
14 January 2026

What is CVE-2025-0647?

A specific memory management issue exists in certain Arm CPUs where executing a CPP RCTX instruction on one Processing Element (PE) can prevent TLB invalidation. This occurs when a TLBI (Translation Lookaside Buffer Invalidate) is issued to the PE, either by itself or by another PE within the same shareability domain. Consequently, the affected PE may hold onto stale TLB entries that should have been cleared, potentially leading to data inconsistency and security risks.

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Affected Version(s)

C1-Premium 0

C1-Ultra 0

Cortex-A710 0

References

https://developer.arm.com/documentation/111546

CVSS V3.1

Score:
7.9
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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