Описание
In the Linux kernel, the following vulnerability has been resolved:
atm: nicstar: Fix possible use-after-free in nicstar_cleanup()
This module's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free.
Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself.
In the Linux kernel, the following vulnerability has been resolved:
atm: nicstar: Fix possible use-after-free in nicstar_cleanup()
This module's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free.
Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself.
Ссылки
- https://nvd.nist.gov/vuln/detail/CVE-2021-47355
- https://git.kernel.org/stable/c/2f958b6f6ba0854b39be748d21dfe71e0fe6580f
- https://git.kernel.org/stable/c/34e7434ba4e97f4b85c1423a59b2922ba7dff2ea
- https://git.kernel.org/stable/c/4e2a0848ea2cab0716d46f85a8ccd5fa9a493e51
- https://git.kernel.org/stable/c/5b991df8881088448cb223e769e37cab8dd40706
- https://git.kernel.org/stable/c/99779c9d9ffc7775da6f7fd8a7c93ac61657bed5
- https://git.kernel.org/stable/c/a7a7b2848312cc4c3a42b6e42a8ab2e441857aba
- https://git.kernel.org/stable/c/a7f7c42e31157d1f0871d6a8e1a0b73a6b4ea785
- https://git.kernel.org/stable/c/bdf5334250c69fabf555b7322c75249ea7d5f148
- https://git.kernel.org/stable/c/c471569632654e57c83512e0fc1ba0dbb4544ad6
Связанные уязвимости
In the Linux kernel, the following vulnerability has been resolved: atm: nicstar: Fix possible use-after-free in nicstar_cleanup() This module's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free. Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself.
In the Linux kernel, the following vulnerability has been resolved: atm: nicstar: Fix possible use-after-free in nicstar_cleanup() This module's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free. Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself.
In the Linux kernel, the following vulnerability has been resolved: atm: nicstar: Fix possible use-after-free in nicstar_cleanup() This module's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free. Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself.
In the Linux kernel, the following vulnerability has been resolved: a ...
Уязвимость функции nicstar_cleanup() модуля drivers/atm/nicstar.c - драйвера поддержки сетевого адаптера ATM ядра операционной системы Linux, позволяющая нарушителю оказать воздействие на конфиденциальность, целостность и доступность защищаемой информации