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Fencer Vulns
medium 6.2

CVE-2019-3016 json

In a Linux KVM guest that has PV TLB enabled, a process in the guest kernel may be able to read memory locations from another process in th…

published 2020-01-31 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-12655

cvss
6.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 49%
public exploits
0
none known

Summary

In a Linux KVM guest that has PV TLB enabled, a process in the guest kernel may be able to read memory locations from another process in the same guest. This problem is limit to the host running linux kernel 4.10 with a guest running linux kernel 4.16 or later. The problem mainly affects AMD processors but Intel CPUs cannot be ruled out.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 5.4.19-1

debian advisories DEBIAN-CVE-2019-3016

  • linux-gcp Ubuntu 18.04 LTS 5.0.0-1033.34
  • linux-hwe Ubuntu 18.04 LTS 5.3.0-42.34~18.04.1
  • linux-azure Ubuntu 18.04 LTS 5.0.0-1035.37
  • linux-aws-5.0 Ubuntu 18.04 LTS 5.0.0-1027.30
  • linux-gcp-5.3 Ubuntu 18.04 LTS 5.3.0-1014.15~18.04.1
  • linux-gke-5.0 Ubuntu 18.04 LTS 5.0.0-1032.33
  • linux-gke-5.3 Ubuntu 18.04 LTS 5.3.0-1014.15~18.04.1
  • linux-oem-osp1 Ubuntu 18.04 LTS 5.0.0-1043.48

ubuntu advisories UBUNTU-CVE-2019-3016

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-rt RHEL 8 4.18.0-193.13.2.rt13.65.el8_2
  • kernel-rt-kvm RHEL 8 4.18.0-193.13.2.rt13.65.el8_2
  • kernel-rt-core RHEL 8 4.18.0-193.13.2.rt13.65.el8_2
  • kernel-rt-modules RHEL 8 4.18.0-193.13.2.rt13.65.el8_2
  • kernel-rt-debug-kvm RHEL 8 4.18.0-193.13.2.rt13.65.el8_2
  • kernel-rt-debug-core RHEL 8 4.18.0-193.13.2.rt13.65.el8_2
  • kernel-rt-debug-modules RHEL 8 4.18.0-193.13.2.rt13.65.el8_2
  • kernel-rt-modules-extra RHEL 8 4.18.0-193.13.2.rt13.65.el8_2

red hat advisories RHSA-2020:3016RHSA-2020:3010

  • kernel-source openSUSE Tumbleweed 5.14.6-1.4
  • kernel-source openSUSE Tumbleweed 6.6.17-1.1

opensuse advisories openSUSE-SU-2024:10728-1openSUSE-SU-2024:13704-1

  • kernel Azure Linux 3.0 6.6.29.1-4
  • kernel CBL-Mariner 2.0 5.10.78.1-1

azure linux advisories AZL-34852AZL-6519

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-3016 updated cvss 2.5

kernel: kvm: Information leak within a KVM guest

  • Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-193.13.2.el8_2, kernel-debuginfo-common-aarch64 4.18.0-193.13.2.el8_2, kernel-debuginfo-common-ppc64le 4.18.0-193.13.2.el8_2 Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-193.13.2.el8_2, kernel 4.18.0-193.13.2.el8_2, bpftool 4.18.0-193.13.2.el8_2, kernel-core 4.18.0-193.13.2.el8_2, kernel-tools 4.18.0-193.13.2.el8_2, python3-perf 4.18.0-193.13.2.el8_2, +15 more
    fixed: vendor fix RHSA-2020:3010
  • Red Hat Enterprise Linux Real Time (v. 8) kernel-rt 4.18.0-193.13.2.rt13.65.el8_2, kernel-rt-core 4.18.0-193.13.2.rt13.65.el8_2, kernel-rt-modules 4.18.0-193.13.2.rt13.65.el8_2, kernel-rt-debug-core 4.18.0-193.13.2.rt13.65.el8_2, kernel-rt-debug-modules 4.18.0-193.13.2.rt13.65.el8_2, kernel-rt-modules-extra 4.18.0-193.13.2.rt13.65.el8_2, +2 more Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt 4.18.0-193.13.2.rt13.65.el8_2, kernel-rt-kvm 4.18.0-193.13.2.rt13.65.el8_2, kernel-rt-core 4.18.0-193.13.2.rt13.65.el8_2, kernel-rt-modules 4.18.0-193.13.2.rt13.65.el8_2, kernel-rt-debug-kvm 4.18.0-193.13.2.rt13.65.el8_2, kernel-rt-debug-core 4.18.0-193.13.2.rt13.65.el8_2, +4 more
    fixed: vendor fix RHSA-2020:3016
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, kernel-alt, python-perf, +9 more Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.62% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 3.1 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 1.9 AV:L/AC:M/Au:N/C:P/I:N/A:N

Affected products

  • linux linux_kernel

Classification

Weakness
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.