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CVE-2019-6974

Status Candidate

Overview

In the Linux kernel before 4.20.8, kvm_ioctl_create_device in virt/kvm/kvm_main.c mishandles reference counting because of a race condition, leading to a use-after-free.

Related Files

Red Hat Security Advisory 2020-0103-01
Posted Jan 14, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-0103-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a use-after-free vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2018-10853, CVE-2018-18281, CVE-2018-20856, CVE-2019-11599, CVE-2019-6974
MD5 | 05272a2469b0aa357075df89b291c39a
Red Hat Security Advisory 2019-3967-01
Posted Nov 26, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-3967-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include denial of service and use-after-free vulnerabilities.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2017-18208, CVE-2018-10902, CVE-2018-18559, CVE-2018-9568, CVE-2019-3900, CVE-2019-5489, CVE-2019-6974, CVE-2019-7221
MD5 | 6797014aea45908319bf51137e0537d7
Red Hat Security Advisory 2019-2809-01
Posted Sep 20, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-2809-01 - The kernel-alt packages provide the Linux kernel version 4.x. Issues addressed include null pointer and use-after-free vulnerabilities.

tags | advisory, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2019-13272, CVE-2019-5489, CVE-2019-6974
MD5 | e717c57f9c31d81a38fc03aec1e5260d
Red Hat Security Advisory 2019-0818-01
Posted Apr 23, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-0818-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a use-after-free vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2019-6974, CVE-2019-7221
MD5 | af2546ab35e9cd32d666eeed6c72825e
Red Hat Security Advisory 2019-0833-01
Posted Apr 23, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-0833-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include a use-after-free vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2019-6974, CVE-2019-7221
MD5 | 9dcbc4c50c1317bdb89525afe9423776
Ubuntu Security Notice USN-3933-2
Posted Apr 3, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3933-2 - USN-3933-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 14.04 LTS for Ubuntu 12.04 ESM. It was discovered that an information leak vulnerability existed in the Bluetooth implementation of the Linux kernel. An attacker within Bluetooth range could possibly expose sensitive information. Various other issues were also addressed.

tags | advisory, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-1000410, CVE-2017-18360, CVE-2018-19824, CVE-2019-3460, CVE-2019-6974, CVE-2019-7222, CVE-2019-9213
MD5 | b78fefb193ca299bd8798a3f0e9cfc39
Ubuntu Security Notice USN-3933-1
Posted Apr 3, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3933-1 - It was discovered that an information leak vulnerability existed in the Bluetooth implementation of the Linux kernel. An attacker within Bluetooth range could possibly expose sensitive information. It was discovered that the USB serial device driver in the Linux kernel did not properly validate baud rate settings when debugging is enabled. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2017-1000410, CVE-2017-18360, CVE-2018-19824, CVE-2019-3460, CVE-2019-6974, CVE-2019-7222, CVE-2019-9213
MD5 | c6a1e9ef0ee7cd623c284d5d2c87b9a1
Ubuntu Security Notice USN-3932-2
Posted Apr 3, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3932-2 - USN-3932-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 LTS. It was discovered that a race condition existed in the f2fs file system implementation in the Linux kernel. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-18249, CVE-2018-14610, CVE-2018-14612, CVE-2018-14613, CVE-2018-14614, CVE-2018-14616, CVE-2018-16884, CVE-2018-9517, CVE-2019-3459, CVE-2019-3701, CVE-2019-3819, CVE-2019-6974, CVE-2019-7221, CVE-2019-7222, CVE-2019-9213
MD5 | c8aeb128181b7d8ea050f623d95a395e
Ubuntu Security Notice USN-3932-1
Posted Apr 3, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3932-1 - It was discovered that a race condition existed in the f2fs file system implementation in the Linux kernel. A local attacker could use this to cause a denial of service. Wen Xu discovered that the f2fs file system implementation in the Linux kernel did not properly validate metadata. An attacker could use this to construct a malicious f2fs image that, when mounted, could cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2017-18249, CVE-2018-14610, CVE-2018-14612, CVE-2018-14613, CVE-2018-14614, CVE-2018-14616, CVE-2018-16884, CVE-2018-9517, CVE-2019-3459, CVE-2019-3701, CVE-2019-3819, CVE-2019-6974, CVE-2019-7221, CVE-2019-7222, CVE-2019-9213
MD5 | 8a7e323053a3b6c044afbb4d8c0594bb
Ubuntu Security Notice USN-3931-2
Posted Apr 3, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3931-2 - USN-3931-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 18.04 LTS for Ubuntu 16.04 LTS and for the Linux Azure kernel for Ubuntu 14.04 LTS. M. Vefa Bicakci and Andy Lutomirski discovered that the kernel did not properly set up all arguments to an error handler callback used when running as a paravirtualized guest. An unprivileged attacker in a paravirtualized guest VM could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2018-14678, CVE-2018-18021, CVE-2018-19824, CVE-2019-3460, CVE-2019-6974, CVE-2019-7221, CVE-2019-7222, CVE-2019-7308, CVE-2019-8912, CVE-2019-8980, CVE-2019-9213
MD5 | 9df4a9429f2b343c6821c2ba1bac6165
Ubuntu Security Notice USN-3931-1
Posted Apr 3, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3931-1 - M. Vefa Bicakci and Andy Lutomirski discovered that the kernel did not properly set up all arguments to an error handler callback used when running as a paravirtualized guest. An unprivileged attacker in a paravirtualized guest VM could use this to cause a denial of service. It was discovered that the KVM implementation in the Linux kernel on ARM 64bit processors did not properly handle some ioctls. An attacker with the privilege to create KVM-based virtual machines could use this to cause a denial of service or execute arbitrary code in the host. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel
systems | linux, ubuntu
advisories | CVE-2018-14678, CVE-2018-18021, CVE-2018-19824, CVE-2019-3460, CVE-2019-6974, CVE-2019-7221, CVE-2019-7222, CVE-2019-7308, CVE-2019-8912, CVE-2019-8980, CVE-2019-9213
MD5 | 9f1f75dea510a42aad60524b705fc805
Ubuntu Security Notice USN-3930-2
Posted Apr 3, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3930-2 - USN-3930-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.10. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 18.10 for Ubuntu 18.04 LTS. Mathias Payer and Hui Peng discovered a use-after-free vulnerability in the Advanced Linux Sound Architecture subsystem. A physically proximate attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2018-19824, CVE-2019-6974, CVE-2019-7221, CVE-2019-7222, CVE-2019-7308, CVE-2019-8912, CVE-2019-8956, CVE-2019-8980, CVE-2019-9003, CVE-2019-9162, CVE-2019-9213
MD5 | 9c768824f53a303a95665d17f07a9cae
Ubuntu Security Notice USN-3930-1
Posted Apr 3, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3930-1 - Mathias Payer and Hui Peng discovered a use-after-free vulnerability in the Advanced Linux Sound Architecture subsystem. A physically proximate attacker could use this to cause a denial of service. Shlomi Oberman, Yuli Shapiro, and Ran Menscher discovered an information leak in the Bluetooth implementation of the Linux kernel. An attacker within Bluetooth range could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, kernel
systems | linux, ubuntu
advisories | CVE-2018-19824, CVE-2019-6974, CVE-2019-7221, CVE-2019-7222, CVE-2019-7308, CVE-2019-8912, CVE-2019-8956, CVE-2019-8980, CVE-2019-9003, CVE-2019-9162, CVE-2019-9213
MD5 | 44762295a5d4aa774924b5f20c9e3872
Linux kvm_ioctl_create_device() Reference Flow Failure
Posted Feb 15, 2019
Authored by Jann Horn, Google Security Research

Linux kvm_ioctl_create_device() installs fd before taking reference.

tags | exploit
systems | linux
advisories | CVE-2019-6974
MD5 | 2c781194b8d221ac15f3178b357e1b58
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