Описание
An issue was discovered in the Linux kernel before 5.0.10. There is a use-after-free in the sound subsystem because card disconnection causes certain data structures to be deleted too early. This is related to sound/core/init.c and sound/core/info.c.
A vulnerability was found in the Linux kernel’s core sound driver code. A use-after-free in a race condition between disconnection events could allow a local attacker who can trigger disconnection events (remove or add hardware) to crash the system, corrupt memory, or escalate privileges.
Меры по смягчению последствий
As the snd module will be auto-loaded when required, its use can be disabled by preventing the module from loading with the following instructions:
echo "install snd /bin/true" >> /etc/modprobe.d/disable-snd.conf
The system will need to be restarted if the snd modules are loaded. In most circumstances, the snd kernel modules will be unable to be unloaded while they are is in use. If the system requires this module to work correctly, this mitigation may not be suitable. If you need further assistance, see KCS article https://access.redhat.com/solutions/41278 or contact Red Hat Global Support Services.
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 | Will not fix | ||
| Red Hat Enterprise Linux 7 | kernel-rt | Affected | ||
| Red Hat Enterprise Linux 8 | kernel-rt | Affected | ||
| Red Hat Enterprise MRG 2 | kernel-rt | Will not fix | ||
| Red Hat Enterprise Linux 7 | kernel | Fixed | RHSA-2020:1016 | 31.03.2020 |
| Red Hat Enterprise Linux 8 | kernel | Fixed | RHSA-2019:3517 | 05.11.2019 |
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Дополнительная информация
Статус:
6.4 Medium
CVSS3
Связанные уязвимости
An issue was discovered in the Linux kernel before 5.0.10. There is a use-after-free in the sound subsystem because card disconnection causes certain data structures to be deleted too early. This is related to sound/core/init.c and sound/core/info.c.
An issue was discovered in the Linux kernel before 5.0.10. There is a use-after-free in the sound subsystem because card disconnection causes certain data structures to be deleted too early. This is related to sound/core/init.c and sound/core/info.c.
An issue was discovered in the Linux kernel before 5.0.10. There is a ...
An issue was discovered in the Linux kernel before 5.0.10. There is a use-after-free in the sound subsystem because card disconnection causes certain data structures to be deleted too early. This is related to sound/core/init.c and sound/core/info.c.
Уязвимость компонентов sound/core/init.c и sound/core/info.c ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании
6.4 Medium
CVSS3