Описание
In the Linux kernel, the following vulnerability has been resolved:
lockd: Plug nlm_file leak when nlm_do_fopen() fails
A client can repeatedly drive nlm_do_fopen() failures by presenting
file handles that the underlying export rejects. After kzalloc_obj()
succeeds in nlm_lookup_file(), the freshly allocated nlm_file is not
yet inserted into nlm_files[]. The nlm_do_fopen() failure path jumps
to out_unlock, which releases nlm_file_mutex and returns without
freeing the allocation, so each failure leaks one nlm_file.
Route the failure through out_free so kfree() runs before the
function returns.
A flaw was found in the Linux kernel's lockd component. A remote attacker can repeatedly trigger failures in the nlm_do_fopen() function by providing specially crafted file handles that the system rejects. This vulnerability causes a memory leak, where each failed operation consumes system memory without releasing it. Over time, this can lead to resource exhaustion and a Denial of Service (DoS) condition for the affected system.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 10 | kernel | Fix deferred | ||
| 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 | Fix deferred | ||
| Red Hat Enterprise Linux 9 | kernel-rt | Fix deferred |
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Дополнительная информация
Статус:
EPSS
4.7 Medium
CVSS3
Связанные уязвимости
In the Linux kernel, the following vulnerability has been resolved: lockd: Plug nlm_file leak when nlm_do_fopen() fails A client can repeatedly drive nlm_do_fopen() failures by presenting file handles that the underlying export rejects. After kzalloc_obj() succeeds in nlm_lookup_file(), the freshly allocated nlm_file is not yet inserted into nlm_files[]. The nlm_do_fopen() failure path jumps to out_unlock, which releases nlm_file_mutex and returns without freeing the allocation, so each failure leaks one nlm_file. Route the failure through out_free so kfree() runs before the function returns.
In the Linux kernel, the following vulnerability has been resolved: lockd: Plug nlm_file leak when nlm_do_fopen() fails A client can repeatedly drive nlm_do_fopen() failures by presenting file handles that the underlying export rejects. After kzalloc_obj() succeeds in nlm_lookup_file(), the freshly allocated nlm_file is not yet inserted into nlm_files[]. The nlm_do_fopen() failure path jumps to out_unlock, which releases nlm_file_mutex and returns without freeing the allocation, so each failure leaks one nlm_file. Route the failure through out_free so kfree() runs before the function returns.
In the Linux kernel, the following vulnerability has been resolved: l ...
EPSS
4.7 Medium
CVSS3