CVSS: 5.5EPSS: 0%CPEs: 1EXPL: 0CVE-2018-1091 – kernel: guest kernel crash during core dump on POWER9 host
https://notcve.org/view.php?id=CVE-2018-1091
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). A flaw was found in the Linux kernel where a crash can be triggered from unprivileged userspace during core dump on a POWER system with a certain configuration. This is 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. • http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c1fa0768a8713b135848f78fd43ffc208d8ded70 http://openwall.com/lists/oss-security/2018/03/27/4 https://access.redhat.com/errata/RHSA-2018:1318 https://access.redhat.com/security/cve/cve-2018-1091 https://bugzilla.redhat.com/show_bug.cgi?id=1558149 https://github.com/torvalds/linux/commit/c1fa0768a8713b135848f78fd43ffc208d8ded70 https://marc.info/?l=linuxppc-embedded&m=150535531910494&w=2 https://www.kernel.org/pub/linux&# • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-391: Unchecked Error Condition •
CVSS: 7.0EPSS: 0%CPEs: 2EXPL: 0CVE-2017-18249
https://notcve.org/view.php?id=CVE-2017-18249
The add_free_nid function in fs/f2fs/node.c in the Linux kernel before 4.12 does not properly track an allocated nid, which allows local users to cause a denial of service (race condition) or possibly have unspecified other impact via concurrent threads. La función add_free_nid en fs/f2fs/noce.c en el kernel de Linux, en versiones anteriores a la 4.12, no rastrea correctamente un nid asignado, lo cual podría permitir a los usuarios locales provocar una denegación de servicio (condición de carrera) o, posiblemente, causar otro impacto sin especificar mediante hilos concurrentes. • http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=30a61ddf8117c26ac5b295e1233eaa9629a94ca3 http://www.securitytracker.com/id/1041432 https://github.com/torvalds/linux/commit/30a61ddf8117c26ac5b295e1233eaa9629a94ca3 https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html https://usn.ubuntu.com/3932-1 https://usn.ubuntu.com/3932-2 • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •
CVSS: 5.5EPSS: 0%CPEs: 5EXPL: 0CVE-2017-18241
https://notcve.org/view.php?id=CVE-2017-18241
fs/f2fs/segment.c in the Linux kernel before 4.13 allows local users to cause a denial of service (NULL pointer dereference and panic) by using a noflush_merge option that triggers a NULL value for a flush_cmd_control data structure. fs/f2fs/segment.c en el kernel de Linux, en versiones anteriores a la 4.13, permite que usuarios locales provoquen una denegación de servicio (desreferencia de puntero NULL y pánico) mediante el uso de una opción noflush_merge que desencadena un valor NULL para una estructura de datos flush_cmd_control. • http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d4fdf8ba0e5808ba9ad6b44337783bd9935e0982 https://github.com/torvalds/linux/commit/d4fdf8ba0e5808ba9ad6b44337783bd9935e0982 https://usn.ubuntu.com/3910-1 https://usn.ubuntu.com/3910-2 https://www.debian.org/security/2018/dsa-4187 https://www.debian.org/security/2018/dsa-4188 • CWE-476: NULL Pointer Dereference •
CVSS: 8.1EPSS: 0%CPEs: 23EXPL: 0CVE-2018-1068 – kernel: Out-of-bounds write via userland offsets in ebt_entry struct in netfilter/ebtables.c
https://notcve.org/view.php?id=CVE-2018-1068
A flaw was found in the Linux 4.x kernel's implementation of 32-bit syscall interface for bridging. This allowed a privileged user to arbitrarily write to a limited range of kernel memory. Se ha encontrado un error en la implementación de la interfaz syscall de 32 bits para puentes de red (bridging) en el kernel de las versiones 4.x de Linux. Esto permitía que un usuario privilegiado escribiese de forma arbitraria en un rango limitado de memoria del kernel. A flaw was found in the Linux kernel's implementation of 32-bit syscall interface for bridging. • http://www.securityfocus.com/bid/103459 https://access.redhat.com/errata/RHSA-2018:1318 https://access.redhat.com/errata/RHSA-2018:1355 https://access.redhat.com/errata/RHSA-2018:2948 https://access.redhat.com/errata/RHSA-2019:1170 https://access.redhat.com/errata/RHSA-2019:1190 https://access.redhat.com/errata/RHSA-2019:4159 https://bugzilla.redhat.com/show_bug.cgi?id=1552048 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b71812168571fa55 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-787: Out-of-bounds Write •
CVSS: 5.5EPSS: 0%CPEs: 1EXPL: 0CVE-2017-18232 – kernel: Mishandling mutex within libsas allowing local Denial of Service
https://notcve.org/view.php?id=CVE-2017-18232
The Serial Attached SCSI (SAS) implementation in the Linux kernel through 4.15.9 mishandles a mutex within libsas, which allows local users to cause a denial of service (deadlock) by triggering certain error-handling code. La implementación SAS (Serial Attached SCSI) en el kernel de Linux, hasta la versión 4.15.9, gestiona de manera incorrecta un mutex en libsas. Esto permite que usuarios locales provoquen una denegación de servicio (deadlock) desencadenando cierto código de gestión de errores. The Serial Attached SCSI (SAS) implementation in the Linux kernel mishandles a mutex within libsas. This allows local users to cause a denial of service (deadlock) by triggering certain error-handling code. • http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0558f33c06bb910e2879e355192227a8e8f0219d http://www.securityfocus.com/bid/103423 https://access.redhat.com/errata/RHSA-2018:3083 https://access.redhat.com/errata/RHSA-2018:3096 https://github.com/torvalds/linux/commit/0558f33c06bb910e2879e355192227a8e8f0219d https://usn.ubuntu.com/4163-1 https://usn.ubuntu.com/4163-2 https://www.debian.org/security/2018/dsa-4187 https://access.redhat.com/security/cve/CVE-2017-18232 • CWE-833: Deadlock •