CVE-2025-0647

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.

Published: 2026-01-14 Last update: 2026-01-26 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-0647 is rated Low Risk (33/100): CVSS High severity, with low exploitation likelihood (EPSS 0.02%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-0647

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-01-14 — 0.02% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-0647

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.9 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 1.5 5.8 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2025-0647

Affected software / configurations for CVE-2025-0647

Vendor Product Version Raw CPE
arm c1-ultra_firmware — cpe:2.3:o:arm:c1-ultra_firmware:-:*:*:*:*:*:*:*
arm c1-premium_firmware — cpe:2.3:o:arm:c1-premium_firmware:-:*:*:*:*:*:*:*
arm cortex-a710_firmware — cpe:2.3:o:arm:cortex-a710_firmware:-:*:*:*:*:*:*:*
arm cortex-x2_firmware — cpe:2.3:o:arm:cortex-x2_firmware:-:*:*:*:*:*:*:*
arm cortex-x3_firmware — cpe:2.3:o:arm:cortex-x3_firmware:-:*:*:*:*:*:*:*
arm cortex-x4_firmware — cpe:2.3:o:arm:cortex-x4_firmware:-:*:*:*:*:*:*:*
arm cortex-x925_firmware — cpe:2.3:o:arm:cortex-x925_firmware:-:*:*:*:*:*:*:*
arm neoverse-v2_firmware — cpe:2.3:o:arm:neoverse-v2_firmware:-:*:*:*:*:*:*:*
arm neoverse-v3_firmware — cpe:2.3:o:arm:neoverse-v3_firmware:-:*:*:*:*:*:*:*
arm neoverse-v3ae_firmware — cpe:2.3:o:arm:neoverse-v3ae_firmware:-:*:*:*:*:*:*:*
arm neoverse-n2_firmware — cpe:2.3:o:arm:neoverse-n2_firmware:-:*:*:*:*:*:*:*

References for CVE-2025-0647

cvelogic Threat Intelligence