Описание
An issue was discovered in __split_huge_pmd in mm/huge_memory.c in the Linux kernel before 5.7.5. The copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check, aka CID-c444eb564fb1.
An issue was discovered in __split_huge_pmd in mm/huge_memory.c in the Linux kernel. The copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check.
Отчет
This flaw has been rated as having Moderateimpact because, based on Red Hat's assessment, this issue is hard to exploit in practice because the race window is too small for it to be reliable.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel | Not affected | ||
| Red Hat Enterprise Linux 7 | kernel | Not affected | ||
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | ||
| Red Hat Enterprise Linux 9 | kernel | Not affected | ||
| Red Hat Enterprise Linux 8 | kernel-rt | Fixed | RHSA-2021:4140 | 09.11.2021 |
| Red Hat Enterprise Linux 8 | kernel | Fixed | RHSA-2021:4356 | 09.11.2021 |
| Red Hat Enterprise Linux 8.2 Extended Update Support | kernel-rt | Fixed | RHSA-2022:5224 | 28.06.2022 |
| Red Hat Enterprise Linux 8.2 Extended Update Support | kernel | Fixed | RHSA-2022:5220 | 28.06.2022 |
| Red Hat Enterprise Linux 8.4 Extended Update Support | kernel-rt | Fixed | RHSA-2022:5633 | 19.07.2022 |
| Red Hat Enterprise Linux 8.4 Extended Update Support | kernel | Fixed | RHSA-2022:5626 | 19.07.2022 |
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Дополнительная информация
Статус:
7 High
CVSS3
Связанные уязвимости
An issue was discovered in __split_huge_pmd in mm/huge_memory.c in the Linux kernel before 5.7.5. The copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check, aka CID-c444eb564fb1.
An issue was discovered in __split_huge_pmd in mm/huge_memory.c in the Linux kernel before 5.7.5. The copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check, aka CID-c444eb564fb1.
An issue was discovered in __split_huge_pmd in mm/huge_memory.c in the ...
Security update for the Linux Kernel (Live Patch 22 for SLE 15 SP1)
7 High
CVSS3