Vulnerability · Published Jan 14, 2026 · Assigned by Arm
CVE-2025-0647
High 7.9
In plain English
A high-severity security flaw in C1-Premium from Arm. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.9High
Exploit odds (30 days)0.2%top 93.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | arm-trusted-firmware | no fix listed | DEBIAN-CVE-2025-0647 |
| Debian:13 | arm-trusted-firmware | no fix listed | DEBIAN-CVE-2025-0647 |
| Debian:14 | arm-trusted-firmware | 2.12.16+dfsg-1 | DEBIAN-CVE-2025-0647 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Arm | Neoverse-N2 | 0 |
| Arm | Neoverse-V3AE | 0 |
| Arm | Neoverse-V3 | 0 |
| Arm | Neoverse-V2 | 0 |
| Arm | Cortex-X925 | 0 |
| Arm | Cortex-X4 | 0 |
| Arm | Cortex-X3 | 0 |
| Arm | Cortex-X2 | 0 |
| Arm | Cortex-A710 | 0 |
| Arm | C1-Premium | 0 |
| Arm | C1-Ultra | 0 |
Weakness: CWE-226 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N