Описание
Use-after-free vulnerability in mm/percpu.c in the Linux kernel through 4.6 allows local users to cause a denial of service (BUG) or possibly have unspecified other impact via crafted use of the mmap and bpf system calls.
Use after free vulnerability was found in percpu using previously allocated memory in bpf. First __alloc_percpu_gfp() is called, then the memory is freed with free_percpu() which triggers async pcpu_balance_work and then pcpu_extend_area_map could use a chunk after it has been freed.
Отчет
This issue does not affect the Linux kernels as shipped with Red Hat Enterprise Linux 4, 5 and 6. This issue affects the Linux kernels as shipped with Red Hat Enterprise Linux 7 and MRG-2 and may be addressed in a future update.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Not affected | ||
| Red Hat Enterprise Linux 6 | kernel | Not affected | ||
| Red Hat Enterprise Linux 7 | kernel-aarch64 | Affected | ||
| Red Hat Enterprise MRG 2 | realtime-kernel | Affected | ||
| Red Hat Enterprise Linux 7 | kernel-rt | Fixed | RHSA-2016:2584 | 03.11.2016 |
| Red Hat Enterprise Linux 7 | kernel | Fixed | RHSA-2016:2574 | 03.11.2016 |
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Дополнительная информация
Статус:
EPSS
7.2 High
CVSS2
Связанные уязвимости
Use-after-free vulnerability in mm/percpu.c in the Linux kernel through 4.6 allows local users to cause a denial of service (BUG) or possibly have unspecified other impact via crafted use of the mmap and bpf system calls.
Use-after-free vulnerability in mm/percpu.c in the Linux kernel through 4.6 allows local users to cause a denial of service (BUG) or possibly have unspecified other impact via crafted use of the mmap and bpf system calls.
Use-after-free vulnerability in mm/percpu.c in the Linux kernel throug ...
Use-after-free vulnerability in mm/percpu.c in the Linux kernel through 4.6 allows local users to cause a denial of service (BUG) or possibly have unspecified other impact via crafted use of the mmap and bpf system calls.
EPSS
7.2 High
CVSS2