Описание
Use-after-free vulnerability in fs/block_dev.c in the Linux kernel before 5.8 allows local users to gain privileges or cause a denial of service by leveraging improper access to a certain error field.
A use-after-free flaw was observed in blkdev_get(), in fs/block_dev.c after a call to __blkdev_get() fails, and its refcount gets freed/released. This problem may cause a denial of service problem with a special user privilege, and may even lead to a confidentiality issue.
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 5 | kernel | Not affected | ||
| Red Hat Enterprise Linux 6 | kernel | Out of support scope | ||
| Red Hat Enterprise Linux 8 | kernel | Not affected | ||
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | ||
| Red Hat Enterprise MRG 2 | kernel-rt | Will not fix | ||
| Red Hat Enterprise Linux 7 | kernel-rt | Fixed | RHSA-2021:0338 | 02.02.2021 |
| Red Hat Enterprise Linux 7 | kernel | Fixed | RHSA-2021:0336 | 02.02.2021 |
| Red Hat Enterprise Linux 7 | kernel-alt | Fixed | RHSA-2021:0354 | 02.02.2021 |
| Red Hat Enterprise Linux 7.6 Extended Update Support | kernel | Fixed | RHSA-2021:1376 | 27.04.2021 |
| Red Hat Enterprise Linux 7.7 Extended Update Support | kernel | Fixed | RHSA-2021:2523 | 22.06.2021 |
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Дополнительная информация
Статус:
EPSS
6.7 Medium
CVSS3
Связанные уязвимости
Use-after-free vulnerability in fs/block_dev.c in the Linux kernel before 5.8 allows local users to gain privileges or cause a denial of service by leveraging improper access to a certain error field.
Use-after-free vulnerability in fs/block_dev.c in the Linux kernel before 5.8 allows local users to gain privileges or cause a denial of service by leveraging improper access to a certain error field.
Use-after-free vulnerability in fs/block_dev.c in the Linux kernel bef ...
Use-after-free vulnerability in fs/block_dev.c in the Linux kernel before 5.8 allows local users to gain privileges or cause a denial of service by leveraging improper access to a certain error field.
EPSS
6.7 Medium
CVSS3