Описание
It was discovered that when exec'ing from a non-leader thread, armed POSIX CPU timers would be left on a list but freed, leading to a use-after-free.
A use-after-free flaw was found in the Linux kernel’s POSIX CPU timers functionality in the way a user creates and then deletes the timer in the non-leader thread of the program. This flaw allows a local user to crash or potentially escalate their privileges on the system.
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 8 | kernel | Not affected | ||
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | ||
| Red Hat Enterprise Linux 9 | kernel | Fixed | RHSA-2022:7318 | 02.11.2022 |
| Red Hat Enterprise Linux 9 | kernel-rt | Fixed | RHSA-2022:7319 | 02.11.2022 |
| Red Hat Enterprise Linux 9 | kernel | Fixed | RHSA-2022:7318 | 02.11.2022 |
| Red Hat Enterprise Linux 9 | kpatch-patch | Fixed | RHSA-2022:7330 | 02.11.2022 |
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Дополнительная информация
Статус:
7.8 High
CVSS3
Связанные уязвимости
It was discovered that when exec'ing from a non-leader thread, armed POSIX CPU timers would be left on a list but freed, leading to a use-after-free.
It was discovered that when exec'ing from a non-leader thread, armed POSIX CPU timers would be left on a list but freed, leading to a use-after-free.
It was discovered that when exec'ing from a non-leader thread, armed P ...
Уязвимость компонента POSIX CPU ядра операционной системы Linux, позволяющая нарушителю выполнить произвольный код
7.8 High
CVSS3