# CVE-2025-0647: arm-trusted-firmware: In certain Arm CPUs, a CPP RCTX instruction executed on one Processing Element (PE) may inhibit TLB invalidation when...

CVE-2025-0647 is fixed in arm-trusted-firmware on 1 platform by DEBIAN-CVE-2025-0647 (version 2.12.16+dfsg-1), released January 14, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-0647
- Priority: High
- CVSS: 7.9 (high)
- EPSS: 0.0017
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 14, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | arm-trusted-firmware Debian 14 | 2.12.16+dfsg-1 | [DEBIAN-CVE-2025-0647](https://patchblox.com/security/data/fix/linux/debian-cve-2025-0647.md) | Jan 14, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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