CVSS: 7.8EPSS: 0%CPEs: 6EXPL: 0CVE-2020-25221
https://notcve.org/view.php?id=CVE-2020-25221
get_gate_page in mm/gup.c in the Linux kernel 5.7.x and 5.8.x before 5.8.7 allows privilege escalation because of incorrect reference counting (caused by gate page mishandling) of the struct page that backs the vsyscall page. The result is a refcount underflow. This can be triggered by any 64-bit process that can use ptrace() or process_vm_readv(), aka CID-9fa2dd946743. La función get_gate_page en el archivo mm/gup.c en el kernel de Linux versiones 5.7.x y versiones 5.8.x anteriores a 5.8.7, permite una escalada de privilegios debido al conteo de referencias incorrecto (causado por el manejo inapropiado de una página de puerta) de la página de estructura que respalda la página vsyscall. El resultado es un subdesbordamiento del conteo. • http://www.openwall.com/lists/oss-security/2020/09/10/4 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.7 https://git.kernel.org/linus/8891adc61dce2a8a41fc0c23262b681c3ec4b73a https://git.kernel.org/linus/9fa2dd946743ae6f30dc4830da19147bf100a7f2 https://security.netapp.com/advisory/ntap-20201001-0003 https://www.openwall.com/lists/oss-security/2020/09/08/4 • CWE-672: Operation on a Resource after Expiration or Release •
CVSS: 7.8EPSS: 0%CPEs: 19EXPL: 2CVE-2020-14356 – kernel: Use After Free vulnerability in cgroup BPF component
https://notcve.org/view.php?id=CVE-2020-14356
A flaw null pointer dereference in the Linux kernel cgroupv2 subsystem in versions before 5.7.10 was found in the way when reboot the system. A local user could use this flaw to crash the system or escalate their privileges on the system. Se detectó un fallo de desreferencia de puntero null en el subsistema cgroupv2 del kernel de Linux en versiones anteriores a 5.7.10, en la manera de reiniciar el sistema. Un usuario local podría usar este fallo para bloquear el sistema o escalar sus privilegios en el sistema. A use-after-free flaw was found in the Linux kernel’s cgroupv2 subsystem when rebooting the system. • http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00047.html http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00007.html https://bugzilla.kernel.org/show_bug.cgi?id=208003 https://bugzilla.redhat.com/show_bug.cgi?id=1868453 https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html https://lore.kernel.org/netdev/C • CWE-416: Use After Free CWE-476: NULL Pointer Dereference •
CVSS: 7.8EPSS: 0%CPEs: 5EXPL: 0CVE-2020-15852
https://notcve.org/view.php?id=CVE-2020-15852
An issue was discovered in the Linux kernel 5.5 through 5.7.9, as used in Xen through 4.13.x for x86 PV guests. An attacker may be granted the I/O port permissions of an unrelated task. This occurs because tss_invalidate_io_bitmap mishandling causes a loss of synchronization between the I/O bitmaps of TSS and Xen, aka CID-cadfad870154. Se detectó un problema en el kernel de Linux versiones 5.5 hasta 5.7.9, como es usado en Xen versiones hasta 4.13.x para invitados PV x86. Un atacante puede otorgar los permisos del puerto de I/O de una tarea no relacionada. • http://www.openwall.com/lists/oss-security/2020/07/21/2 http://xenbits.xen.org/xsa/advisory-329.html https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cadfad870154e14f745ec845708bc17d166065f2 https://github.com/torvalds/linux/commit/cadfad870154e14f745ec845708bc17d166065f2 https://security.netapp.com/advisory/ntap-20200810-0001 • CWE-276: Incorrect Default Permissions •
CVSS: 6.5EPSS: 0%CPEs: 45EXPL: 0CVE-2020-13143
https://notcve.org/view.php?id=CVE-2020-13143
gadget_dev_desc_UDC_store in drivers/usb/gadget/configfs.c in the Linux kernel 3.16 through 5.6.13 relies on kstrdup without considering the possibility of an internal '\0' value, which allows attackers to trigger an out-of-bounds read, aka CID-15753588bcd4. En la función gadget_dev_desc_UDC_store en el archivo drivers/usb/gadget/configfs.c en el kernel de Linux versión 3.16 hasta la versión 5.6.13, se basa en kstrdup sin considerar la posibilidad de un valor "\0" interno, lo que permite a atacantes desencadenar una lectura fuera de límites, también se conoce como CID-15753588bcd4 • http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=d126cf46f829d146dde3e6a8963e095ac6cfcd1c https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=15753588bcd4bbffae1cca33c8ced5722477fe1f https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html https://lists.debian.org/debian-lts-announce/2020/06/msg00012 • CWE-125: Out-of-bounds Read •
CVSS: 5.3EPSS: 0%CPEs: 44EXPL: 0CVE-2020-12888 – Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario
https://notcve.org/view.php?id=CVE-2020-12888
The VFIO PCI driver in the Linux kernel through 5.6.13 mishandles attempts to access disabled memory space. El controlador VFIO PCI en el kernel de Linux versiones hasta 5.6.13, maneja inapropiadamente los intentos para acceder al espacio de memoria deshabilitado. A flaw was found in the Linux kernel, where it allows userspace processes, for example, a guest VM, to directly access h/w devices via its VFIO driver modules. The VFIO modules allow users to enable or disable access to the devices' MMIO memory address spaces. If a user attempts to access the read/write devices' MMIO address space when it is disabled, some h/w devices issue an interrupt to the CPU to indicate a fatal error condition, crashing the system. • http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html http://www.openwall.com/lists/oss-security/2020/05/19/6 https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org • CWE-248: Uncaught Exception CWE-755: Improper Handling of Exceptional Conditions •