Описание
An issue was discovered in the FUSE filesystem implementation in the Linux kernel before 5.10.6, aka CID-5d069dbe8aaf. fuse_do_getattr() calls make_bad_inode() in inappropriate situations, causing a system crash. NOTE: the original fix for this vulnerability was incomplete, and its incompleteness is tracked as CVE-2021-28950.
A denial of service flaw was found in fuse_do_getattr in fs/fuse/dir.c in the kernel side of the FUSE filesystem in the Linux kernel. A local user could use this flaw to crash the system.
Отчет
This issue affected Linux kernel versions as shipped with Red Hat Enterprise Linux from 8.3 and prior the versions. RHEL 8.4 and later versions are not affected.
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-alt | Will not fix | ||
| Red Hat Enterprise Linux 8 | kernel-rt | Affected | ||
| Red Hat Enterprise Linux 9 | kernel | Not affected | ||
| Red Hat Enterprise Linux 7 | kernel-rt | Fixed | RHSA-2022:0065 | 11.01.2022 |
| Red Hat Enterprise Linux 7 | kernel | Fixed | RHSA-2022:0063 | 11.01.2022 |
| Red Hat Enterprise Linux 8 | kernel | Fixed | RHSA-2021:1578 | 18.05.2021 |
| Red Hat Enterprise Linux 8.2 Extended Update Support | kernel-rt | Fixed | RHSA-2022:0078 | 11.01.2022 |
| Red Hat Enterprise Linux 8.2 Extended Update Support | kernel | Fixed | RHSA-2022:0072 | 11.01.2022 |
Показывать по
Дополнительная информация
Статус:
EPSS
5.5 Medium
CVSS3
Связанные уязвимости
An issue was discovered in the FUSE filesystem implementation in the Linux kernel before 5.10.6, aka CID-5d069dbe8aaf. fuse_do_getattr() calls make_bad_inode() in inappropriate situations, causing a system crash. NOTE: the original fix for this vulnerability was incomplete, and its incompleteness is tracked as CVE-2021-28950.
An issue was discovered in the FUSE filesystem implementation in the Linux kernel before 5.10.6, aka CID-5d069dbe8aaf. fuse_do_getattr() calls make_bad_inode() in inappropriate situations, causing a system crash. NOTE: the original fix for this vulnerability was incomplete, and its incompleteness is tracked as CVE-2021-28950.
An issue was discovered in the FUSE filesystem implementation in the L ...
An issue was discovered in the FUSE filesystem implementation in the Linux kernel before 5.10.6, aka CID-5d069dbe8aaf. fuse_do_getattr() calls make_bad_inode() in inappropriate situations, causing a system crash. NOTE: the original fix for this vulnerability was incomplete, and its incompleteness is tracked as CVE-2021-28950.
Уязвимость реализации файловой системы FUSE ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании
EPSS
5.5 Medium
CVSS3