CVE-2019-6974
Published: 15 February 2019
In the Linux kernel before 4.20.8, kvm_ioctl_create_device in virt/kvm/kvm_main.c mishandles reference counting because of a race condition, leading to a use-after-free.
From the Ubuntu Security Team
Jann Horn discovered that the KVM implementation in the Linux kernel contained a use-after-free vulnerability. An attacker in a guest VM with access to /dev/kvm could use this to cause a denial of service (guest VM crash).
Priority
Status
| Package | Release | Status |
|---|---|---|
|
linux Launchpad, Ubuntu, Debian |
upstream |
Released
(5.0~rc6)
|
| trusty |
Released
(3.13.0-168.218)
|
|
| xenial |
Released
(4.4.0-145.171)
|
|
| bionic |
Released
(4.15.0-47.50)
|
|
| cosmic |
Released
(4.18.0-17.18)
|
|
| disco |
Not vulnerable
(5.0.0-7.8)
|
|
|
Patches: Introduced by 852b6d57dc7fa378019786fa84727036e56839ea |
||
|
linux-flo Launchpad, Ubuntu, Debian |
trusty |
Does not exist
(trusty was ignored [abandoned])
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Ignored
(abandoned)
|
|
|
linux-aws Launchpad, Ubuntu, Debian |
upstream |
Released
(5.0~rc6)
|
| trusty |
Released
(4.4.0-1040.43)
|
|
| xenial |
Released
(4.4.0-1079.89)
|
|
| bionic |
Released
(4.15.0-1035.37)
|
|
| cosmic |
Released
(4.18.0-1012.14)
|
|
| disco |
Not vulnerable
(5.0.0-1001.1)
|
|
|
linux-azure Launchpad, Ubuntu, Debian |
bionic |
Released
(4.18.0-1014.14~18.04.1)
|
| cosmic |
Released
(4.18.0-1014.14)
|
|
| disco |
Not vulnerable
(5.0.0-1001.1)
|
|
| upstream |
Released
(5.0~rc6)
|
|
| trusty |
Released
(4.15.0-1041.45~14.04.1)
|
|
| xenial |
Released
(4.15.0-1041.45)
|
|
|
linux-euclid Launchpad, Ubuntu, Debian |
upstream |
Released
(5.0~rc6)
|
| trusty |
Does not exist
|
|
| xenial |
Ignored
(was needed ESM criteria)
|
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
|
linux-gcp-edge Launchpad, Ubuntu, Debian |
bionic |
Released
(4.18.0-1008.9~18.04.1)
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Does not exist
|
|
|
linux-aws-hwe Launchpad, Ubuntu, Debian |
upstream |
Released
(5.0~rc6)
|
| trusty |
Does not exist
|
|
| xenial |
Released
(4.15.0-1035.37~16.04.1)
|
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
|
linux-azure-edge Launchpad, Ubuntu, Debian |
bionic |
Released
(4.18.0-1014.14~18.04.1)
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Released
(4.15.0-1041.45)
|
|
|
linux-gcp Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1029.31)
|
| cosmic |
Released
(4.18.0-1008.9)
|
|
| disco |
Not vulnerable
(5.0.0-1001.1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Released
(4.15.0-1029.31~16.04.1)
|
|
|
linux-gke Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Ignored
(end of standard support)
|
|
|
linux-goldfish Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Ignored
(end of life)
|
|
|
linux-grouper Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Does not exist
|
|
|
linux-hwe Launchpad, Ubuntu, Debian |
bionic |
Released
(4.18.0-17.18~18.04.1)
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Released
(4.15.0-47.50~16.04.1)
|
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.0.0-15.16~18.04.1)
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Released
(4.15.0-47.50~16.04.1)
|
|
|
linux-kvm Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1031.31)
|
| cosmic |
Released
(4.18.0-1009.9)
|
|
| disco |
Not vulnerable
(5.0.0-1001.1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Released
(4.4.0-1043.49)
|
|
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| trusty |
Ignored
(end of life, was ignored)
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-vivid Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| trusty |
Ignored
(end of life, was ignored)
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-wily Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| trusty |
Ignored
(end of life, was ignored)
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| trusty |
Released
(4.4.0-144.170~14.04.1)
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Does not exist
|
|
|
linux-maguro Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Does not exist
|
|
|
linux-mako Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Ignored
(abandoned)
|
|
|
linux-manta Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Does not exist
|
|
|
linux-oem Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1035.40)
|
| cosmic |
Released
(4.15.0-1035.40)
|
|
| disco |
Not vulnerable
(4.15.0-1035.40)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Ignored
(end of standard support, was needs-triage)
|
|
|
linux-oracle Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1010.12)
|
| cosmic |
Released
(4.15.0-1010.12)
|
|
| disco |
Not vulnerable
(4.15.0-1010.12)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Released
(4.15.0-1010.12~16.04.1)
|
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1033.35)
|
| cosmic |
Released
(4.18.0-1011.13)
|
|
| disco |
Not vulnerable
(5.0.0-1004.4)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Released
(4.4.0-1106.114)
|
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1053.57)
|
| cosmic |
Does not exist
|
|
| disco |
Not vulnerable
(5.0.0-1010.10)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.0~rc6)
|
|
| xenial |
Released
(4.4.0-1110.115)
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 8.1 |
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6974
- https://ubuntu.com/security/notices/USN-3930-1
- https://ubuntu.com/security/notices/USN-3930-2
- https://ubuntu.com/security/notices/USN-3931-1
- https://ubuntu.com/security/notices/USN-3931-2
- https://ubuntu.com/security/notices/USN-3932-1
- https://ubuntu.com/security/notices/USN-3932-2
- https://ubuntu.com/security/notices/USN-3933-1
- https://ubuntu.com/security/notices/USN-3933-2
- NVD
- Launchpad
- Debian