CVE-2018-16882 (retired)

Priority
Description
A use-after-free issue was found in the way the Linux kernel's KVM
hypervisor processed posted interrupts when nested(=1) virtualization is
enabled. In nested_get_vmcs12_pages(), in case of an error while processing
posted interrupt address, it unmaps the 'pi_desc_page' without resetting
'pi_desc' descriptor address, which is later used in
pi_test_and_clear_on(). A guest user/process could use this flaw to crash
the host kernel resulting in DoS or potentially gain privileged access to a
system. Kernel versions before 4.14.91 and before 4.19.13 are vulnerable.
Ubuntu-Description
Cfir Cohen discovered that a use-after-free vulnerability existed in the
KVM implementation of the Linux kernel, when handling interrupts in
environments where nested virtualization is in use (nested KVM
virtualization is not enabled by default in Ubuntu kernels). A local
attacker in a guest VM could possibly use this to gain administrative
privileges in a host machine.
Notes
 tyhicks> Ubuntu kernels do not enable nested KVM virtualization by default and
  are unaffected by this flaw in the default configuration. To ensure that
  nested virtualization is not enabled, verify that the
  /sys/module/kvm_intel/parameters/nested file contains "N".
Assigned-to
tyhicks
Package
Source: linux (LP Ubuntu Debian)
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):not-affected (3.0.0-12.20)
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.2.0-16.19)
Ubuntu 18.04 LTS (Bionic Beaver):released (4.15.0-44.47)
Ubuntu 19.04 (Disco Dingo):not-affected (4.19.0-12.13)
Patches:
Introduced by 5e2f30b756a37bd80c5b0471d0e10d769ab2eb9aFixed by c2dd5146e9fe1f22c77c1b011adf84eea0245806
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.4.0-1001.10)
Ubuntu 18.04 LTS (Bionic Beaver):released (4.15.0-1032.34)
Ubuntu 19.04 (Disco Dingo):not-affected (4.18.0-1008.10)
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):released (4.15.0-1032.34~16.04.1)
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):released (4.15.0-1037.39~16.04.1)
Ubuntu 18.04 LTS (Bionic Beaver):released (4.15.0-1037.39)
Ubuntu 19.04 (Disco Dingo):not-affected (4.18.0-1008.8)
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):released (4.15.0-1037.39~16.04.1)
Ubuntu 18.04 LTS (Bionic Beaver):released (4.15.0-1037.39)
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.4.0-9019.20)
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):ignored (abandoned)
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):released (4.15.0-1027.28~16.04.1)
Ubuntu 18.04 LTS (Bionic Beaver):released (4.15.0-1027.28)
Ubuntu 19.04 (Disco Dingo):not-affected (4.18.0-1006.7)
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):released (4.18.0-1006.7~18.04.1)
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):ignored (end-of-life)
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):ignored (end-of-life)
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):released (4.15.0-45.48~16.04.1)
Ubuntu 18.04 LTS (Bionic Beaver):released (4.18.0-14.15~18.04.1)
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):released (4.15.0-45.48~16.04.1)
Ubuntu 18.04 LTS (Bionic Beaver):not-affected (5.0.0-8.9~18.04.1)
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.4.0-1004.9)
Ubuntu 18.04 LTS (Bionic Beaver):released (4.15.0-1029.29)
Ubuntu 19.04 (Disco Dingo):not-affected (4.18.0-1007.7)
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):not-affected (3.13.0-24.46~precise1)
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):ignored (abandoned)
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Ubuntu 18.04 LTS (Bionic Beaver):DNE
Ubuntu 19.04 (Disco Dingo):DNE
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):ignored (was needs-triage now end-of-life)
Ubuntu 18.04 LTS (Bionic Beaver):released (4.15.0-1033.38)
Ubuntu 19.04 (Disco Dingo):not-affected (4.15.0-1033.38)
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):released (4.15.0-1008.10~16.04.1)
Ubuntu 18.04 LTS (Bionic Beaver):released (4.15.0-1008.10)
Ubuntu 19.04 (Disco Dingo):not-affected (4.15.0-1008.10)
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.2.0-1013.19)
Ubuntu 18.04 LTS (Bionic Beaver):released (4.15.0-1031.33)
Ubuntu 19.04 (Disco Dingo):not-affected (4.18.0-1009.11)
Package
Upstream:released (4.20)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.4.0-1012.12)
Ubuntu 18.04 LTS (Bionic Beaver):not-affected
Ubuntu 19.04 (Disco Dingo):not-affected
More Information

Updated: 2019-08-23 09:31:18 UTC (commit 436fd4ed4cf0038ddd382cb8649607ace163dda7)