In certain Arm CPUs, a CPP RCTX instruction executed on one Processing Element (PE) may inhibit TLB invalidation when a TLBI is issued to…

Description

In certain Arm CPUs, a CPP RCTX instruction executed on one Processing Element (PE) may inhibit TLB invalidation when a TLBI is issued to the PE, either by the same PE or another PE in the shareability domain. In this case, the PE may retain stale TLB entries which should have been invalidated by the TLBI.

Scores

EPSS (exploitation in 30 days)

0.17% · top 94% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.9.

Weakness

• CWE-226 Sensitive Information in Resource Not Removed Before Reuse (opens in a new tab)All about CWE-226 and its CVEs

Affected products

• Arm · Neoverse-N2

  • affected 0

• Arm · Neoverse-V3AE

  • affected 0

• Arm · Neoverse-V3

  • affected 0

• Arm · Neoverse-V2

  • affected 0

• Arm · Cortex-X925

  • affected 0

• Arm · Cortex-X4

  • affected 0

• Arm · Cortex-X3

  • affected 0

• Arm · Cortex-X2

  • affected 0

• Arm · Cortex-A710

  • affected 0

• Arm · C1-Premium

  • affected 0

• Arm · C1-Ultra

  • affected 0

References (2)

• https://developer.arm.com/documentation/111546 (opens in a new tab)
• https://graph.volerion.com/view?ID=CVE-2025-0647 (opens in a new tab)third-party-advisory

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2025-0647](https://trackcve.app/badge/CVE-2025-0647.svg)](https://trackcve.app/cve/CVE-2025-0647)

Record last updated 20 Jan 2026, 15:21 UTC.