Описание
Incorrect initialization of resource in the branch prediction unit for some Intel(R) Core™ Ultra Processors may allow an authenticated user to potentially enable information disclosure via local access.
A flaw was found in the Branch Prediction Unit (BPU) of Intel's Lion Core CPUs that make it possible for an attacker to bypass Indirect Branch Predictor Barrier (IBPB) protections. By employing branch predictor training techniques as described in the "Training Solo" publication, an attacker with local privileges could use this bypass to exfiltrate sensitive data from an affected system, including from host hypervisors or neighboring guests in virtualized environments.
Отчет
This vulnerability was disclosed as part of the "Training Solo" report. Training Solo is a technique similar to Spectre-v2 which bypasses extant protections like IBPB or IBRS. While the technique primarily bypasses those protections by performing branch predictor training in a privileged domain, CVE-2025-24495 specifically relates to a hardware flaw in Intel's Lion Core CPUs. Intel has released a microcode update to address this flaw.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. As this is a bypass of previous mitigations for existing hardware flaws, we do not expect that mitigations specifically for this issue will be available.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 10 | microcode_ctl | Not affected | ||
| Red Hat Enterprise Linux 6 | microcode_ctl | Fix deferred | ||
| Red Hat Enterprise Linux 7.7 Advanced Update Support | microcode_ctl | Fixed | RHSA-2025:10111 | 01.07.2025 |
| Red Hat Enterprise Linux 7 Extended Lifecycle Support | microcode_ctl | Fixed | RHSA-2025:10108 | 01.07.2025 |
| Red Hat Enterprise Linux 8 | microcode_ctl | Fixed | RHSA-2025:10991 | 14.07.2025 |
| Red Hat Enterprise Linux 8.2 Advanced Update Support | microcode_ctl | Fixed | RHSA-2025:10126 | 01.07.2025 |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | microcode_ctl | Fixed | RHSA-2025:10107 | 01.07.2025 |
| Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | microcode_ctl | Fixed | RHSA-2025:10109 | 01.07.2025 |
| Red Hat Enterprise Linux 8.6 Telecommunications Update Service | microcode_ctl | Fixed | RHSA-2025:10109 | 01.07.2025 |
| Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions | microcode_ctl | Fixed | RHSA-2025:10109 | 01.07.2025 |
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Дополнительная информация
Статус:
EPSS
5.6 Medium
CVSS3
Связанные уязвимости
Incorrect initialization of resource in the branch prediction unit for some Intel(R) Core™ Ultra Processors may allow an authenticated user to potentially enable information disclosure via local access.
Incorrect initialization of resource in the branch prediction unit for some Intel(R) Core™ Ultra Processors may allow an authenticated user to potentially enable information disclosure via local access.
Incorrect initialization of resource in the branch prediction unit for ...
Incorrect initialization of resource in the branch prediction unit for some Intel(R) Core™ Ultra Processors may allow an authenticated user to potentially enable information disclosure via local access.
Уязвимость модуля Branch Prediction Unit (BPU) микропрограммного обеспечения процессоров Intel Core Ultra, позволяющая нарушителю раскрыть защищаемую информацию
EPSS
5.6 Medium
CVSS3