In the flush_tmregs_to_thread function in arch/powerpc/kernel/ptrace.c in the Linux kernel before 4.13.5, a guest kernel crash can be…
redhat·CWE-391·Published 2018-03-27
In the flush_tmregs_to_thread function in arch/powerpc/kernel/ptrace.c in the Linux kernel before 4.13.5, a guest kernel crash can be triggered from unprivileged userspace during a core dump on a POWER host due to a missing processor feature check and an erroneous use of transactional memory (TM) instructions in the core dump path, leading to a denial of service.
In the flush_tmregs_to_thread function in arch/powerpc/kernel/ptrace.c in the Linux kernel before 4.13.5, a guest kernel crash can be triggered from unprivileged userspace during a core dump on a POWER host due to a missing processor feature check and an erroneous use of transactional memory (TM) instructions in the core dump path, leading to a denial of service.
En la función flush_tmregs_to_thread en arch/powerpc/kernel/ptrace.c en el kernel de Linux, en versiones anteriores a la 4.13.5, se puede desencadenar un cierre inesperado del kernel invitado desde un espacio de usuario sin privilegios durante un volcado de memoria en un host POWER. Esto se debe a la falta de verificación de la funcionalidad del procesador y un uso erróneo de las instrucciones de la memoria transaccional (TM) en la ruta de volcado de memoria, lo que da lugar a una denegación de servicio (DoS).
| Version | Type | Source | Base | Exp | Impact | Vector |
|---|---|---|---|---|---|---|
| 2.0 | Primary | NVD | 4.9 | 3.9 | 6.9 | AV:L/AC:L/Au:N/C:N/I:N/A:C |
| 3.0 | Primary | NVD | 5.5 | 1.8 | 3.6 | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |