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CVE-2019-14821

Status Candidate

Overview

An out-of-bounds access issue was found in the Linux kernel, all versions through 5.3, in the way Linux kernel's KVM hypervisor implements the Coalesced MMIO write operation. It operates on an MMIO ring buffer 'struct kvm_coalesced_mmio' object, wherein write indices 'ring->first' and 'ring->last' value could be supplied by a host user-space process. An unprivileged host user or process with access to '/dev/kvm' device could use this flaw to crash the host kernel, resulting in a denial of service or potentially escalating privileges on the system.

Related Files

Red Hat Security Advisory 2020-0204-01
Posted Jan 23, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-0204-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include denial of service, heap overflow, and use-after-free vulnerabilities.

tags | advisory, denial of service, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2018-12207, CVE-2018-16884, CVE-2019-0154, CVE-2019-0155, CVE-2019-10126, CVE-2019-11135, CVE-2019-14816, CVE-2019-14821, CVE-2019-14901, CVE-2019-3900, CVE-2019-5489, CVE-2019-9506
MD5 | 8ed65fed136027cab3a33df882cdd686
Red Hat Security Advisory 2020-0027-01
Posted Jan 6, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-0027-01 - This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify the code of a running kernel. Issues addressed include a use-after-free vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2019-14821, CVE-2019-15239
MD5 | 01b87d8c941f26941553a4bf8b4b632f
Red Hat Security Advisory 2019-4256-01
Posted Dec 17, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-4256-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a null pointer vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2019-14821
MD5 | 6af2cb0432b92697a43571f499f13f0a
Red Hat Security Advisory 2019-4154-01
Posted Dec 10, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-4154-01 - The kernel-alt packages provide the Linux kernel version 4.x. Issues addressed include denial of service and use-after-free vulnerabilities.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2017-18203, CVE-2018-14625, CVE-2018-16658, CVE-2019-14821
MD5 | 2a327ad8d6f2963af70c2ad9086e5e8f
Red Hat Security Advisory 2019-3978-01
Posted Nov 26, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-3978-01 - 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-2019-14821, CVE-2019-15239
MD5 | 20a9c9dcd47c9d6df51538455b3ed08a
Red Hat Security Advisory 2019-3979-01
Posted Nov 26, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-3979-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include null pointer and use-after-free vulnerabilities.

tags | advisory, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2019-14821, CVE-2019-15239
MD5 | ddf6fc978b2c40d7bc122ca86b148153
Slackware Security Advisory - Slackware 14.2 kernel Updates
Posted Nov 8, 2019
Authored by Slackware Security Team | Site slackware.com

Slackware Security Advisory - New kernel packages are available for Slackware 14.2 to fix security issues.

tags | advisory, kernel
systems | linux, slackware
advisories | CVE-2016-10905, CVE-2016-10906, CVE-2018-20976, CVE-2019-10638, CVE-2019-14814, CVE-2019-14816, CVE-2019-14821, CVE-2019-14835, CVE-2019-15098, CVE-2019-15117, CVE-2019-15118, CVE-2019-15505, CVE-2019-16746, CVE-2019-17052, CVE-2019-17053, CVE-2019-17054, CVE-2019-17055, CVE-2019-17056, CVE-2019-17075, CVE-2019-17133, CVE-2019-2215, CVE-2019-3900
MD5 | 89355d12b17a57544c4036152b14969e
Red Hat Security Advisory 2019-3517-01
Posted Nov 6, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-3517-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include denial of service, heap overflow, information leakage, and use-after-free vulnerabilities.

tags | advisory, denial of service, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2015-1593, CVE-2018-16884, CVE-2018-19854, CVE-2018-19985, CVE-2018-20169, CVE-2019-10126, CVE-2019-10207, CVE-2019-10638, CVE-2019-11599, CVE-2019-11833, CVE-2019-11884, CVE-2019-13233, CVE-2019-14821, CVE-2019-15916, CVE-2019-3459, CVE-2019-3460, CVE-2019-3874, CVE-2019-3882, CVE-2019-3900, CVE-2019-5489, CVE-2019-7222, CVE-2019-9506
MD5 | 6d1ca3b131a0815a02a22b4f2f5f2856
Red Hat Security Advisory 2019-3309-01
Posted Nov 6, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-3309-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include denial of service, heap overflow, information leakage, null pointer, and use-after-free vulnerabilities.

tags | advisory, denial of service, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2018-16884, CVE-2018-19854, CVE-2018-19985, CVE-2018-20169, CVE-2019-10126, CVE-2019-10207, CVE-2019-10638, CVE-2019-11599, CVE-2019-11833, CVE-2019-11884, CVE-2019-13233, CVE-2019-14821, CVE-2019-15916, CVE-2019-3459, CVE-2019-3460, CVE-2019-3874, CVE-2019-3882, CVE-2019-3900, CVE-2019-5489, CVE-2019-7222, CVE-2019-9506
MD5 | a0f2e867941fc69f77f5654ca781bae3
Kernel Live Patch Security Notice LSN-0058-1
Posted Oct 23, 2019
Authored by Benjamin M. Romer

It was discovered that a race condition existed in the GFS2 file system in the Linux kernel. A local attacker could possibly use this to cause a denial of service (system crash). It was discovered that a use-after-free error existed in the block layer subsystem of the Linux kernel when certain failure conditions occurred. A local attacker could possibly use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux
advisories | CVE-2016-10905, CVE-2018-20856, CVE-2018-20961, CVE-2018-20976, CVE-2018-21008, CVE-2019-0136, CVE-2019-10126, CVE-2019-10207, CVE-2019-11477, CVE-2019-11478, CVE-2019-11833, CVE-2019-12614, CVE-2019-14283, CVE-2019-14284, CVE-2019-14814, CVE-2019-14815, CVE-2019-14816, CVE-2019-14821, CVE-2019-14835, CVE-2019-2054, CVE-2019-2181, CVE-2019-3846
MD5 | aa1b2d5e0e41264715ab20ee76ffa47d
Ubuntu Security Notice USN-4162-2
Posted Oct 23, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4162-2 - USN-4162-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the corresponding updates for the Linux kernel for Microsoft Azure Cloud systems for Ubuntu 14.04 ESM. It was discovered that the RSI 91x Wi-Fi driver in the Linux kernel did not did not handle detach operations correctly, leading to a use-after-free vulnerability. A physically proximate attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2018-21008, CVE-2019-14815, CVE-2019-14816, CVE-2019-14821, CVE-2019-15117, CVE-2019-15118, CVE-2019-15505, CVE-2019-15902, CVE-2019-15918
MD5 | 3e3f2ea22058c41745d3f9b8662322db
Ubuntu Security Notice USN-4163-2
Posted Oct 23, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4163-2 - USN-4163-1 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 ESM. It was discovered that a race condition existed in the ARC EMAC ethernet driver for the Linux kernel, resulting in a use-after-free vulnerability. An 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-2016-10906, CVE-2017-18232, CVE-2018-21008, CVE-2019-14816, CVE-2019-14821, CVE-2019-15117, CVE-2019-15118, CVE-2019-15505, CVE-2019-15902
MD5 | c0aa284e15530090be4397bd622f2915
Ubuntu Security Notice USN-4163-1
Posted Oct 22, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4163-1 - It was discovered that a race condition existed in the ARC EMAC ethernet driver for the Linux kernel, resulting in a use-after-free vulnerability. An attacker could use this to cause a denial of service. It was discovered that a race condition existed in the Serial Attached SCSI implementation in the Linux kernel when handling certain error conditions. 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-2016-10906, CVE-2017-18232, CVE-2018-21008, CVE-2019-14816, CVE-2019-14821, CVE-2019-15117, CVE-2019-15118, CVE-2019-15505, CVE-2019-15902
MD5 | 3f63ba945772d16fae61eba485d3eab9
Ubuntu Security Notice USN-4162-1
Posted Oct 22, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4162-1 - It was discovered that the RSI 91x Wi-Fi driver in the Linux kernel did not did not handle detach operations correctly, leading to a use-after-free vulnerability. A physically proximate attacker could use this to cause a denial of service or possibly execute arbitrary code. Wen Huang discovered that the Marvell Wi-Fi device driver in the Linux kernel did not properly perform bounds checking, leading to a heap overflow. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2018-21008, CVE-2019-14815, CVE-2019-14816, CVE-2019-14821, CVE-2019-15117, CVE-2019-15118, CVE-2019-15505, CVE-2019-15902, CVE-2019-15918
MD5 | b951fc58b34ed48fd82f3107a2bf05c2
Ubuntu Security Notice USN-4157-2
Posted Oct 22, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4157-2 - USN-4157-1 fixed vulnerabilities in the Linux kernel for Ubuntu 19.04. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 19.04 for Ubuntu 18.04 LTS. Wen Huang discovered that the Marvell Wi-Fi device driver in the Linux kernel did not properly perform bounds checking, leading to a heap overflow. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2019-14814, CVE-2019-14815, CVE-2019-14816, CVE-2019-14821, CVE-2019-15504, CVE-2019-15505, CVE-2019-15902, CVE-2019-16714, CVE-2019-2181
MD5 | 739bbc1907a2787aeff5444c0e073eff
Ubuntu Security Notice USN-4157-1
Posted Oct 17, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4157-1 - Wen Huang discovered that the Marvell Wi-Fi device driver in the Linux kernel did not properly perform bounds checking, leading to a heap overflow. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Matt Delco discovered that the KVM hypervisor implementation in the Linux kernel did not properly perform bounds checking when handling coalesced MMIO write operations. A local attacker with write access to /dev/kvm could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2019-14814, CVE-2019-14815, CVE-2019-14816, CVE-2019-14821, CVE-2019-15504, CVE-2019-15505, CVE-2019-15902, CVE-2019-16714, CVE-2019-2181
MD5 | cf8f7834679112d7b1f99a08e16b2bfe
Debian Security Advisory 4531-1
Posted Sep 25, 2019
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4531-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, debian
advisories | CVE-2019-14821, CVE-2019-14835, CVE-2019-15117, CVE-2019-15118, CVE-2019-15902
MD5 | 941d9665b70a22d5d1251b0ca14396f4
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