Описание
An issue was discovered in fs/fuse/fuse_i.h in the Linux kernel before 5.11.8. A "stall on CPU" can occur because a retry loop continually finds the same bad inode, aka CID-775c5033a0d1.
A denial of service in the kernel side of the FUSE functionality can allow a local system to create a denial of service.
Меры по смягчению последствий
As the FUSE module will be auto-loaded when required, its use can be disabled by preventing the module from loading with the following instructions:
echo "install fuse /bin/true" >> /etc/modprobe.d/disable-fuse.conf
The system will need to be restarted if the FUSE modules are loaded. In most circumstances, the CIFS kernel modules will be unable to be unloaded while the FUSE filesystems are 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 6 | kernel | Out of support scope | ||
| Red Hat Enterprise Linux 7 | kernel | Not affected | ||
| Red Hat Enterprise Linux 7 | kernel-alt | 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 8.4 Extended Update Support | kernel-rt | Fixed | RHSA-2021:4648 | 15.11.2021 |
| Red Hat Enterprise Linux 8.4 Extended Update Support | kernel | Fixed | RHSA-2021:4650 | 15.11.2021 |
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Дополнительная информация
Статус:
EPSS
5.5 Medium
CVSS3
Связанные уязвимости
An issue was discovered in fs/fuse/fuse_i.h in the Linux kernel before 5.11.8. A "stall on CPU" can occur because a retry loop continually finds the same bad inode, aka CID-775c5033a0d1.
An issue was discovered in fs/fuse/fuse_i.h in the Linux kernel before 5.11.8. A "stall on CPU" can occur because a retry loop continually finds the same bad inode, aka CID-775c5033a0d1.
An issue was discovered in fs/fuse/fuse_i.h in the Linux kernel before ...
An issue was discovered in fs/fuse/fuse_i.h in the Linux kernel before 5.11.8. A "stall on CPU" can occur because a retry loop continually finds the same bad inode, aka CID-775c5033a0d1.
EPSS
5.5 Medium
CVSS3