Описание
In the Linux kernel, the following vulnerability has been resolved:
nfsd: fix potential UAF in nfsd4_cb_getattr_release
Once we drop the delegation reference, the fields embedded in it are no
longer safe to access. Do that last.
A flaw was found in the nfsd component of the Linux kernel. This use-after-free (UAF) vulnerability occurs because fields embedded in a delegation reference are accessed after the reference has been dropped, making them unsafe. This could lead to a system crash or other unpredictable behavior.
Отчет
This flaw has currently no known exploit.
Меры по смягчению последствий
If NFS server functionality is not required, disable the nfs-server service to prevent the nfsd kernel module from loading and exposing this vulnerability.
To disable the service:
sudo systemctl disable --now nfs-server
This action will stop the NFS server and prevent it from starting automatically on boot. A system reboot may be required to fully unload the nfsd module if it was already in use. Disabling the NFS server will impact any services or clients relying on it.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel | Out of support scope | ||
| Red Hat Enterprise Linux 7 | kernel | Out of support scope | ||
| Red Hat Enterprise Linux 7 | kernel-rt | Out of support scope | ||
| Red Hat Enterprise Linux 8 | kernel | Not affected | ||
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | ||
| Red Hat Enterprise Linux 9 | kernel | Not affected | ||
| Red Hat Enterprise Linux 9 | kernel-rt | Not affected |
Показывать по
Дополнительная информация
Статус:
7.3 High
CVSS3
Связанные уязвимости
In the Linux kernel, the following vulnerability has been resolved: nfsd: fix potential UAF in nfsd4_cb_getattr_release Once we drop the delegation reference, the fields embedded in it are no longer safe to access. Do that last.
In the Linux kernel, the following vulnerability has been resolved: nfsd: fix potential UAF in nfsd4_cb_getattr_release Once we drop the delegation reference, the fields embedded in it are no longer safe to access. Do that last.
In the Linux kernel, the following vulnerability has been resolved: n ...
In the Linux kernel, the following vulnerability has been resolved: nfsd: fix potential UAF in nfsd4_cb_getattr_release Once we drop the delegation reference, the fields embedded in it are no longer safe to access. Do that last.
Уязвимость функции nfsd4_cb_getattr_release() сетевой файловой системы Network File System (NFS) ядра операционной системы Linux, позволяющая нарушителю оказать воздействие на конфиденциальность, целостность и доступность защищаемой информации
7.3 High
CVSS3