Описание
In the Linux kernel, the following vulnerability has been resolved:
KVM: x86/xen: Fix cleanup logic in emulation of Xen schedop poll hypercalls
kvm_xen_schedop_poll does a kmalloc_array() when a VM polls the host for more than one event channel potr (nr_ports > 1).
After the kmalloc_array(), the error paths need to go through the "out" label, but the call to kvm_read_guest_virt() does not.
[Adjusted commit message. - Paolo]
In the Linux kernel, the following vulnerability has been resolved:
KVM: x86/xen: Fix cleanup logic in emulation of Xen schedop poll hypercalls
kvm_xen_schedop_poll does a kmalloc_array() when a VM polls the host for more than one event channel potr (nr_ports > 1).
After the kmalloc_array(), the error paths need to go through the "out" label, but the call to kvm_read_guest_virt() does not.
[Adjusted commit message. - Paolo]
Ссылки
- https://nvd.nist.gov/vuln/detail/CVE-2025-38469
- https://git.kernel.org/stable/c/061c553c66bc1638c280739999224c8000fd4602
- https://git.kernel.org/stable/c/3ee59c38ae7369ad1f7b846e05633ccf0d159fab
- https://git.kernel.org/stable/c/5a53249d149f48b558368c5338b9921b76a12f8c
- https://git.kernel.org/stable/c/fd627ac8a5cff4d45269f164b13ddddc0726f2cc
Связанные уязвимости
In the Linux kernel, the following vulnerability has been resolved: KVM: x86/xen: Fix cleanup logic in emulation of Xen schedop poll hypercalls kvm_xen_schedop_poll does a kmalloc_array() when a VM polls the host for more than one event channel potr (nr_ports > 1). After the kmalloc_array(), the error paths need to go through the "out" label, but the call to kvm_read_guest_virt() does not. [Adjusted commit message. - Paolo]
In the Linux kernel, the following vulnerability has been resolved: KVM: x86/xen: Fix cleanup logic in emulation of Xen schedop poll hypercalls kvm_xen_schedop_poll does a kmalloc_array() when a VM polls the host for more than one event channel potr (nr_ports > 1). After the kmalloc_array(), the error paths need to go through the "out" label, but the call to kvm_read_guest_virt() does not. [Adjusted commit message. - Paolo]
In the Linux kernel, the following vulnerability has been resolved: KVM: x86/xen: Fix cleanup logic in emulation of Xen schedop poll hypercalls kvm_xen_schedop_poll does a kmalloc_array() when a VM polls the host for more than one event channel potr (nr_ports > 1). After the kmalloc_array(), the error paths need to go through the "out" label, but the call to kvm_read_guest_virt() does not. [Adjusted commit message. - Paolo]
In the Linux kernel, the following vulnerability has been resolved: K ...
Уязвимость функции kmalloc_array() компонента KVM ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании