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CVE-2019-19338

Status Candidate

Overview

A flaw was found in the fix for CVE-2019-11135, in the Linux upstream kernel versions before 5.5 where, the way Intel CPUs handle speculative execution of instructions when a TSX Asynchronous Abort (TAA) error occurs. When a guest is running on a host CPU affected by the TAA flaw (TAA_NO=0), but is not affected by the MDS issue (MDS_NO=1), the guest was to clear the affected buffers by using a VERW instruction mechanism. But when the MDS_NO=1 bit was exported to the guests, the guests did not use the VERW mechanism to clear the affected buffers. This issue affects guests running on Cascade Lake CPUs and requires that host has 'TSX' enabled. Confidentiality of data is the highest threat associated with this vulnerability.

Related Files

Red Hat Security Advisory 2020-1465-01
Posted Apr 15, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-1465-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a buffer overflow vulnerability.

tags | advisory, overflow, kernel
systems | linux, redhat
advisories | CVE-2019-17666, CVE-2019-19338
SHA-256 | 920696c0e32317a6d3b2b3813652b6ec4156aaf52111b944643b5cc67468b844
Red Hat Security Advisory 2020-0834-01
Posted Mar 18, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-0834-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include buffer overflow and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2019-11487, CVE-2019-17666, CVE-2019-19338
SHA-256 | 758a425822c3749b7f1c327d3b1465dd171e616d8dec19e7e019946e186c08ee
Red Hat Security Advisory 2020-0839-01
Posted Mar 18, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-0839-01 - 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 and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2019-11487, CVE-2019-17666, CVE-2019-19338
SHA-256 | 86bf34ad4e6ff350aaa75831b2d6bf93552d185d2baf99a97059c30ad2a3aa0b
Red Hat Security Advisory 2020-0339-01
Posted Feb 4, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-0339-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include buffer overflow, denial of service, and heap overflow vulnerabilities.

tags | advisory, denial of service, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2019-14814, CVE-2019-14815, CVE-2019-14816, CVE-2019-14895, CVE-2019-14898, CVE-2019-14901, CVE-2019-17666, CVE-2019-19338
SHA-256 | ce69800232591b72a523684eb099476df657102a813c373811d059ac7d6c2172
Red Hat Security Advisory 2020-0328-01
Posted Feb 4, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-0328-01 - 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, denial of service, and heap overflow vulnerabilities.

tags | advisory, denial of service, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2019-14814, CVE-2019-14815, CVE-2019-14816, CVE-2019-14895, CVE-2019-14898, CVE-2019-14901, CVE-2019-17666, CVE-2019-19338
SHA-256 | 285620c5a99661a5c23bb5d947afda78d77b787a2cf4a55d1795ac5be0dd61a9
Slackware Security Advisory - Slackware 14.2 kernel Updates
Posted Jan 9, 2020
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-2019-12614, CVE-2019-15291, CVE-2019-15917, CVE-2019-18660, CVE-2019-18683, CVE-2019-19057, CVE-2019-19062, CVE-2019-19063, CVE-2019-19227, CVE-2019-19332, CVE-2019-19338, CVE-2019-19524
SHA-256 | eed7b636ea5edbc1a400cd97ce4d08253b8e383d64a35a30fa8f5b9d768f838d
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