CVE-2025-0647
Arm CPUs TLB Invalidation Inhibition Vulnerability
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.
INFO
Published Date :
Jan. 14, 2026, 11:15 a.m.
Last Modified :
Jan. 26, 2026, 7:40 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2025-0647
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | ||||
| CVSS 3.1 | HIGH | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update CPU microcode to the latest version.
- Ensure TLBI instructions are correctly processed.
- Consult CPU vendor for specific mitigation steps.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-0647.
| URL | Resource |
|---|---|
| https://developer.arm.com/documentation/111546 | Vendor Advisory |
| https://graph.volerion.com/view?ID=CVE-2025-0647 | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-0647 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-0647
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-0647 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-0647 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jan. 26, 2026
Action Type Old Value New Value Added CPE Configuration AND OR *cpe:2.3:o:arm:c1-ultra_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:arm:c1-ultra:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:arm:c1-premium_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:arm:c1-premium:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:arm:cortex-a710_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:arm:cortex-a710:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:arm:cortex-x2_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:arm:cortex-x2:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:arm:cortex-x3_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:arm:cortex-x3:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:arm:cortex-x4_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:arm:cortex-x4:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:arm:cortex-x925_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:arm:cortex-x925:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:arm:neoverse-v2_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:arm:neoverse-v2:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:arm:neoverse-v3_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:arm:neoverse-v3:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:arm:neoverse-v3ae_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:arm:neoverse-v3ae:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:arm:neoverse-n2_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:arm:neoverse-n2:-:*:*:*:*:*:*:* Added Reference Type Arm Limited: https://developer.arm.com/documentation/111546 Types: Vendor Advisory Added Reference Type CISA-ADP: https://graph.volerion.com/view?ID=CVE-2025-0647 Types: Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jan. 20, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N Removed CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Added Reference https://graph.volerion.com/view?ID=CVE-2025-0647 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jan. 15, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N -
New CVE Received by [email protected]
Jan. 14, 2026
Action Type Old Value New Value Added 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. Added CWE CWE-226 Added Reference https://developer.arm.com/documentation/111546