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CVE-2019-3887

Status Candidate

Overview

A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Rregister (MSR) access with nested(=1) virtualization enabled. In that, L1 guest could access L0's APIC register values via L2 guest, when 'virtualize x2APIC mode' is enabled. A guest could use this flaw to potentially crash the host kernel resulting in DoS issue. Kernel versions from 4.16 and newer are vulnerable to this issue.

Related Files

Red Hat Security Advisory 2019-2741-01
Posted Sep 11, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-2741-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include buffer overflow, bypass, denial of service, heap overflow, and use-after-free vulnerabilities.

tags | advisory, denial of service, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2019-11487, CVE-2019-3846, CVE-2019-3887, CVE-2019-9500, CVE-2019-9503
SHA-256 | 5f9e06ffb42d649fcd1a5f4909c6f524bed20e4c72252170dc1208e70a2ea784
Red Hat Security Advisory 2019-2703-01
Posted Sep 10, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-2703-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include buffer overflow, bypass, denial of service, heap overflow, and use-after-free vulnerabilities.

tags | advisory, denial of service, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2018-19824, CVE-2019-11487, CVE-2019-12817, CVE-2019-3846, CVE-2019-3887, CVE-2019-9500, CVE-2019-9503
SHA-256 | 6aacbcf84bb45ef802cdd0185418df3143d468b0ab80ee560822676b92380c24
Ubuntu Security Notice USN-3980-2
Posted May 15, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3980-2 - USN-3980-1 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.

tags | advisory, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2018-16884, CVE-2019-11091, CVE-2019-3874, CVE-2019-3882, CVE-2019-3887, CVE-2019-9500, CVE-2019-9503
SHA-256 | 4e7461c438ebdef1b2b7c4b1914afe31f352038acdee164b1ad7feae87945aea
Ubuntu Security Notice USN-3980-1
Posted May 15, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3980-1 - Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Giorgi Maisuradze, Dan Horea Lutas, Andrei Lutas, Volodymyr Pikhur, Stephan van Schaik, Alyssa Milburn, Sebastian Ă–sterlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Moritz Lipp, Michael Schwarz, and Daniel Gruss discovered that memory previously stored in microarchitectural fill buffers of an Intel CPU core may be exposed to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2018-16884, CVE-2019-11091, CVE-2019-3874, CVE-2019-3882, CVE-2019-3887, CVE-2019-9500, CVE-2019-9503
SHA-256 | 27fa82e43c03f6a2ef67978f272d0864107e13d76a5ef2e1702474c83dd7ed72
Ubuntu Security Notice USN-3979-1
Posted May 15, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3979-1 - Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Giorgi Maisuradze, Dan Horea Lutas, Andrei Lutas, Volodymyr Pikhur, Stephan van Schaik, Alyssa Milburn, Sebastian Ă–sterlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Moritz Lipp, Michael Schwarz, and Daniel Gruss discovered that memory previously stored in microarchitectural fill buffers of an Intel CPU core may be exposed to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2019-11091, CVE-2019-11683, CVE-2019-1999, CVE-2019-3874, CVE-2019-3882, CVE-2019-3887, CVE-2019-9500, CVE-2019-9503
SHA-256 | 469e9577332cf818d48cd761700164fa249baa9fa2c810918818cfb037f323aa
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