Описание
A use-after-free flaw was found in fs/userfaultfd.c in the Linux kernel before 4.13.6. The issue is related to the handling of fork failure when dealing with event messages. Failure to fork correctly can lead to a situation where a fork event will be removed from an already freed list of events with userfaultfd_ctx_put().
A flaw was found in the Linux kernel's handling of fork failure when dealing with event messages in the userfaultfd code. Failure to fork correctly can create a fork event that will be removed from an already freed list of events.
Отчет
This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5 and 6. This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 7, realtime, MRG-2 prior to version kernel-3.10.0-781. The kernel-alt package already as shipped contains this fix.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Not affected | ||
| Red Hat Enterprise Linux 6 | kernel | Not affected | ||
| Red Hat Enterprise Linux 7 | kernel-alt | Not affected | ||
| Red Hat Enterprise Linux 8 | kernel | Not affected | ||
| Red Hat Enterprise MRG 2 | realtime-kernel | Affected | ||
| Red Hat Enterprise Linux 7 | kernel-rt | Fixed | RHSA-2018:0676 | 10.04.2018 |
| Red Hat Enterprise Linux 7 | kernel | Fixed | RHSA-2018:1062 | 10.04.2018 |
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Дополнительная информация
Статус:
EPSS
7 High
CVSS3
Связанные уязвимости
A use-after-free flaw was found in fs/userfaultfd.c in the Linux kernel before 4.13.6. The issue is related to the handling of fork failure when dealing with event messages. Failure to fork correctly can lead to a situation where a fork event will be removed from an already freed list of events with userfaultfd_ctx_put().
A use-after-free flaw was found in fs/userfaultfd.c in the Linux kernel before 4.13.6. The issue is related to the handling of fork failure when dealing with event messages. Failure to fork correctly can lead to a situation where a fork event will be removed from an already freed list of events with userfaultfd_ctx_put().
A use-after-free flaw was found in fs/userfaultfd.c in the Linux kerne ...
A use-after-free flaw was found in fs/userfaultfd.c in the Linux kernel before 4.13.6. The issue is related to the handling of fork failure when dealing with event messages. Failure to fork correctly can lead to a situation where a fork event will be removed from an already freed list of events with userfaultfd_ctx_put().
Уязвимость ядра операционной системы Linux (fs/userfaultfd.c), связанная с использованием памяти после её освобождения, позволяющая нарушителю оказать воздействие на конфиденциальность, целостность и доступность защищаемой информации
EPSS
7 High
CVSS3