CVSS: 6.7EPSS: 0%CPEs: 44EXPL: 0CVE-2020-12770 – kernel: sg_write function lacks an sg_remove_request call in a certain failure case
https://notcve.org/view.php?id=CVE-2020-12770
An issue was discovered in the Linux kernel through 5.6.11. sg_write lacks an sg_remove_request call in a certain failure case, aka CID-83c6f2390040. Se detectó un problema en el kernel de Linux versiones hasta 5.6.11. La función sg_write, carece de una llamada a sg_remove_request en un determinado caso de fallo, también se conoce como CID-83c6f2390040. A vulnerability was found in sg_write in drivers/scsi/sg.c in the SCSI generic (sg) driver subsystem. This flaw allows an attacker with local access and special user or root privileges to cause a denial of service if the allocated list is not cleaned with an invalid (Sg_fd * sfp) pointer at the time of failure, also possibly causing a kernel internal information leak problem. • https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=83c6f2390040f188cc25b270b4befeb5628c1aee https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ES5C6ZCMALBEBMKNNCTBSLLSYGFZG3FF https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedora • CWE-416: Use After Free •
CVSS: 5.5EPSS: 0%CPEs: 41EXPL: 1CVE-2020-12771
https://notcve.org/view.php?id=CVE-2020-12771
An issue was discovered in the Linux kernel through 5.6.11. btree_gc_coalesce in drivers/md/bcache/btree.c has a deadlock if a coalescing operation fails. Se detectó un problema en el kernel de Linux versiones hasta 5.6.11. La función btree_gc_coalesce en el archivo drivers/md/bcache/btree.c, presenta un punto muerto si se produce un fallo de la operación de coalescencia. • http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00071.html http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html https://lists.debian.org/debian-lts-announce/2020/08/msg00019.html https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html https://lkml.org/lkml/2020/4/26/87 https://security.netapp.com/advisory/ntap-20200608-0001 https://usn.ubuntu.com/4462-1 https: • CWE-667: Improper Locking •
CVSS: 4.7EPSS: 0%CPEs: 1EXPL: 2CVE-2019-20794
https://notcve.org/view.php?id=CVE-2019-20794
An issue was discovered in the Linux kernel 4.18 through 5.6.11 when unprivileged user namespaces are allowed. A user can create their own PID namespace, and mount a FUSE filesystem. Upon interaction with this FUSE filesystem, if the userspace component is terminated via a kill of the PID namespace's pid 1, it will result in a hung task, and resources being permanently locked up until system reboot. This can result in resource exhaustion. Se detectó un problema en el kernel de Linux versiones 4.18 hasta 5.6.11, cuando los espacios de nombre de un usuario no privilegiado están permitidos. • http://www.openwall.com/lists/oss-security/2020/08/24/1 https://github.com/sargun/fuse-example https://security.netapp.com/advisory/ntap-20200608-0001 https://sourceforge.net/p/fuse/mailman/message/36598753 • CWE-772: Missing Release of Resource after Effective Lifetime •
CVSS: 6.5EPSS: 0%CPEs: 35EXPL: 0CVE-2020-10690 – kernel: use-after-free in cdev_put() when a PTP device is removed while it's chardev is open
https://notcve.org/view.php?id=CVE-2020-10690
There is a use-after-free in kernel versions before 5.5 due to a race condition between the release of ptp_clock and cdev while resource deallocation. When a (high privileged) process allocates a ptp device file (like /dev/ptpX) and voluntarily goes to sleep. During this time if the underlying device is removed, it can cause an exploitable condition as the process wakes up to terminate and clean all attached files. The system crashes due to the cdev structure being invalid (as already freed) which is pointed to by the inode. Se presenta un uso de la memoria previamente liberada en kernel versiones anteriores a 5.5, debido a una condición de carrera entre la liberación de ptp_clock y cdev durante la desasignación de recursos. • http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10690 https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html https://security.netapp.com/advisory/ntap-20200608-0001 https://usn.ubuntu.com/4419-1 https://access.redhat.com/security/cve/CVE-2020-10690 https://bugzilla.redhat.com/show_bug.cgi?id=1817141 • CWE-416: Use After Free •
CVSS: 7.2EPSS: 0%CPEs: 17EXPL: 1CVE-2020-12659 – kernel: xdp_umem_reg in net/xdp/xdp_umem.c has an out-of-bounds write which could result in crash and data coruption
https://notcve.org/view.php?id=CVE-2020-12659
An issue was discovered in the Linux kernel before 5.6.7. xdp_umem_reg in net/xdp/xdp_umem.c has an out-of-bounds write (by a user with the CAP_NET_ADMIN capability) because of a lack of headroom validation. Se detectó un problema en el kernel de Linux versiones anteriores a 5.6.7. En la función xdp_umem_reg en el archivo net/xdp/xdp_umem.c se presenta una escritura fuera de límites (por un usuario con la capacidad CAP_NET_ADMIN) debido a una falta de comprobación del headroom. An out-of-bounds (OOB) memory access flaw was found in the Network XDP (the eXpress Data Path) module in the Linux kernel's xdp_umem_reg function in net/xdp/xdp_umem.c. When a user with special user privilege of CAP_NET_ADMIN (or root) calls setsockopt to register umem ring on XDP socket, passing the headroom value larger than the available space in the chunk, it leads to an out-of-bounds write, causing panic or possible memory corruption. • http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html https://bugzilla.kernel.org/show_bug.cgi?id=207225 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.7 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=99e3a236dd43d06c65af0a2ef9cb44306aef6e02 https://github.com/torvalds/linux/commit/99e3a236dd43d06c65af0a2ef9cb44306aef6e02 https://security.netapp.com/advisory/ntap-20200608-0001 https://usn.ubuntu.com/4387-1 https://usn.ubuntu.com/4388- • CWE-787: Out-of-bounds Write •