FKIE_CVE-2025-0647

Vulnerability from fkie_nvd - Published: 2026-01-14 11:15 - Updated: 2026-01-26 19:40
Severity ?
7.9 (High) - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Summary
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.
References
arm-security@arm.comhttps://developer.arm.com/documentation/111546Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://graph.volerion.com/view?ID=CVE-2025-0647Third Party Advisory
Impacted products
Vendor Product Version
arm c1-ultra_firmware -
arm c1-ultra -
arm c1-premium_firmware -
arm c1-premium -
arm cortex-a710_firmware -
arm cortex-a710 -
arm cortex-x2_firmware -
arm cortex-x2 -
arm cortex-x3_firmware -
arm cortex-x3 -
arm cortex-x4_firmware -
arm cortex-x4 -
arm cortex-x925_firmware -
arm cortex-x925 -
arm neoverse-v2_firmware -
arm neoverse-v2 -
arm neoverse-v3_firmware -
arm neoverse-v3 -
arm neoverse-v3ae_firmware -
arm neoverse-v3ae -
arm neoverse-n2_firmware -
arm neoverse-n2 -
To clipboard 

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      "value": "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."
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      "value": "En ciertos CPUs Arm, una instrucci\u00f3n CPP RCTX ejecutada en un Elemento de Procesamiento (PE) puede inhibir la invalidaci\u00f3n de la TLB cuando se emite una TLBI al PE, ya sea por el mismo PE o por otro PE en el dominio de compartibilidad. En este caso, el PE puede retener entradas TLB obsoletas que deber\u00edan haber sido invalidadas por la TLBI."
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  "lastModified": "2026-01-26T19:40:19.270",
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          "availabilityImpact": "NONE",
          "baseScore": 7.9,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N",
          "version": "3.1"
        },
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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  "published": "2026-01-14T11:15:50.027",
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          "value": "CWE-226"
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      ],
      "source": "arm-security@arm.com",
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Nomenclature

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