Описание
A memory leak in the alloc_sgtable() function in drivers/net/wireless/intel/iwlwifi/fw/dbg.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering alloc_page() failures, aka CID-b4b814fec1a5.
A flaw was found in the Linux kernel. The Intel Wireless WiFi MVM Firmware driver mishandles resource cleanup during device coredump. An attacker able to trigger the device coredump and system-wide out of memory conditions at the same time could use this flaw to crash the system. The highest threat from this vulnerability is to system availability.
Отчет
This issue is rated as having Low impact because of the preconditions needed to trigger the resource cleanup code path (system-wide out-of-memory condition).
Меры по смягчению последствий
In order to mitigate this issue it is possible to prevent the affected code from being loaded by blacklisting the kernel module iwlmvm. For instructions relating to how to blacklist a kernel module refer to: https://access.redhat.com/solutions/41278 .
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Out of support scope | ||
| Red Hat Enterprise Linux 6 | kernel | Out of support scope | ||
| Red Hat Enterprise Linux 7 | kernel-alt | Fix deferred | ||
| Red Hat Enterprise MRG 2 | kernel-rt | Out of support scope | ||
| Red Hat Enterprise Linux 7 | kernel-rt | Fixed | RHSA-2020:4062 | 29.09.2020 |
| Red Hat Enterprise Linux 7 | kernel | Fixed | RHSA-2020:4060 | 29.09.2020 |
| Red Hat Enterprise Linux 8 | kernel-rt | Fixed | RHSA-2020:1567 | 28.04.2020 |
| Red Hat Enterprise Linux 8 | kernel | Fixed | RHSA-2020:1769 | 28.04.2020 |
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Дополнительная информация
Статус:
4.7 Medium
CVSS3
Связанные уязвимости
A memory leak in the alloc_sgtable() function in drivers/net/wireless/intel/iwlwifi/fw/dbg.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering alloc_page() failures, aka CID-b4b814fec1a5.
A memory leak in the alloc_sgtable() function in drivers/net/wireless/intel/iwlwifi/fw/dbg.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering alloc_page() failures, aka CID-b4b814fec1a5.
A memory leak in the alloc_sgtable() function in drivers/net/wireless/ ...
A memory leak in the alloc_sgtable() function in drivers/net/wireless/intel/iwlwifi/fw/dbg.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering alloc_page() failures, aka CID-b4b814fec1a5.
Уязвимость функции alloc_sgtable() (drivers/net/wireless/intel/iwlwifi/fw/dbg.c) ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании
4.7 Medium
CVSS3