CVE-2019-3016

Priority
Description
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.
Ubuntu-Description
It was discovered that the KVM implementation in the Linux kernel, when
paravirtual TLB flushes are enabled in guests, the hypervisor in some
situations could miss deferred TLB flushes or otherwise mishandle them. An
attacker in a guest VM could use this to expose sensitive information (read
memory from another guest VM).
Assigned-to
cascardo
Notes
tyhicksThis issue does not affect default installations of Ubuntu as the
paravirtual TLB flush feature in KVM is not enabled by default. The QEMU CPU
feature "kvm-pv-tlb-flush" is used to enable paravirtual TLB flush.
cascardoIt is thought that issue does not affect Intel processors
*not* supporting Process-Context Identifiers (PCIDs). You can check
support for PCIDs on systems with Intel processors by running "grep pcid
/proc/cpuinfo" and verifying that "pcid" shows as one of the flags.
it was mentioned that it was only easily reproducible on AMD
CPUs.
Package
Source: linux (LP Ubuntu Debian)
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):not-affected (3.0.0-12.20)
Ubuntu 14.04 ESM (Trusty Tahr):not-affected (3.11.0-12.19)
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.2.0-16.19)
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (4.13.0-16.19)
Ubuntu 19.10 (Eoan Ermine):released (5.3.0-42.34)
Ubuntu 20.04 (Focal Fossa):needed
Patches:
Introduced by
f38a7b75267f1fb240a8178cbcb16d66dd37aac8
Fixed by
8c6de56a42e0c657955e12b882a81ef07d1d073e
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):not-affected (4.4.0-1002.2)
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.4.0-1001.10)
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (4.15.0-1001.1)
Ubuntu 19.10 (Eoan Ermine):released (5.3.0-1013.14)
Ubuntu 20.04 (Focal Fossa):needed
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):released (5.0.0-1027.30)
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 (Focal Fossa):DNE
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.15.0-1030.31~16.04.1)
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 (Focal Fossa):DNE
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):ignored (was needed ESM criteria)
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.11.0-1009.9)
Ubuntu 18.04 LTS (Bionic Beaver):released (5.0.0-1035.37)
Ubuntu 19.10 (Eoan Ermine):released (5.3.0-1016.17)
Ubuntu 20.04 (Focal Fossa):needed
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):released (5.3.0-1016.17~18.04.1)
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 (Focal Fossa):DNE
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):ignored (was needs-triage now end-of-life)
Ubuntu 18.04 LTS (Bionic Beaver):ignored (was needs-triage now end-of-life)
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 (Focal Fossa):DNE
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.10.0-1004.4)
Ubuntu 18.04 LTS (Bionic Beaver):released (5.0.0-1033.34)
Ubuntu 19.10 (Eoan Ermine):released (5.3.0-1014.15)
Ubuntu 20.04 (Focal Fossa):needed
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):released (5.3.0-1014.15~18.04.1)
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 (Focal Fossa):DNE
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):ignored (was needs-triage now end-of-life)
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 (Focal Fossa):DNE
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (4.15.0-1030.32)
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 (Focal Fossa):DNE
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):released (5.0.0-1032.33)
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 (Focal Fossa):DNE
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):released (5.3.0-1014.15~18.04.1)
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 (Focal Fossa):DNE
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.8.0-36.36~16.04.1)
Ubuntu 18.04 LTS (Bionic Beaver):released (5.3.0-42.34~18.04.1)
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 (Focal Fossa):DNE
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):ignored (was needs-triage now end-of-life)
Ubuntu 18.04 LTS (Bionic Beaver):ignored (was needs-triage now end-of-life)
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 (Focal Fossa):DNE
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.4.0-1004.9)
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (4.15.0-1002.2)
Ubuntu 19.10 (Eoan Ermine):released (5.3.0-1012.13)
Ubuntu 20.04 (Focal Fossa):needed
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):not-affected (3.13.0-24.46~precise1)
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 (Focal Fossa):DNE
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):not-affected (4.4.0-13.29~14.04.1)
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 (Focal Fossa):DNE
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):ignored (was needs-triage now end-of-life)
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (4.15.0-1002.3)
Ubuntu 19.10 (Eoan Ermine):not-affected (4.15.0-1035.40)
Ubuntu 20.04 (Focal Fossa):DNE
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 (Focal Fossa):needed
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):released (5.0.0-1043.48)
Ubuntu 19.10 (Eoan Ermine):needed
Ubuntu 20.04 (Focal Fossa):DNE
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.15.0-1007.9~16.04.1)
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (4.15.0-1007.9)
Ubuntu 19.10 (Eoan Ermine):released (5.3.0-1011.12)
Ubuntu 20.04 (Focal Fossa):needed
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):released (5.0.0-1013.18)
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 (Focal Fossa):DNE
Package
Upstream:needs-triage
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):not-affected
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 (Focal Fossa):DNE
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.2.0-1013.19)
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (4.13.0-1005.5)
Ubuntu 19.10 (Eoan Ermine):released (5.3.0-1019.21)
Ubuntu 20.04 (Focal Fossa):ignored (was needed now end-of-life)
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):released (5.3.0-1019.21~18.04.1)
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 (Focal Fossa):DNE
Package
Upstream:needed
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.4.0-1012.12)
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (4.4.0-1077.82)
Ubuntu 19.10 (Eoan Ermine):DNE
Ubuntu 20.04 (Focal Fossa):DNE
More Information

Updated: 2020-03-25 04:16:30 UTC (commit 38f2f4ca77c9fe09b202953003da484ab34743be)