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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Arm | Neoverse-N2 | — | — |
| Arm | Neoverse-V3AE | — | — |
| Arm | Neoverse-V3 | — | — |
| Arm | Neoverse-V2 | — | — |
| Arm | Cortex-X925 | — | — |
| Arm | Cortex-X4 | — | — |
| Arm | Cortex-X3 | — | — |
| Arm | Cortex-X2 | — | — |
| Arm | Cortex-A710 | — | — |
| Arm | C1-Premium | — | — |
| Arm | C1-Ultra | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | arm-trusted-firmware | 2.12.16+dfsg-1 | — |
| Debian 13 | arm-trusted-firmware | No fix yet | — |
| Debian 12 | arm-trusted-firmware | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | arm-trusted-firmware | No fix yet | — |
| Ubuntu 26.04 LTS | arm-trusted-firmware | No fix yet | — |
| Ubuntu 24.04 LTS | arm-trusted-firmware | No fix yet | — |
| Ubuntu 22.04 LTS | arm-trusted-firmware | No fix yet | — |
| Ubuntu 20.04 LTS | arm-trusted-firmware | No fix yet | — |
Advisories 3
- WID-SEC-2026-4288 Android Patchday November 2026 (Google Android, Automotive OS and XR): Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 10, 2026
- NCSC-2026-0467 Kwetsbaarheden verholpen in Google Android en Samsung Mobile NCSC-NL (Netherlands) · Nov 5, 2026
- WID-SEC-2026-0122 Google Cloud Platform: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Jan 14, 2026