CVE-2020-12768
Published: 9 May 2020
** DISPUTED ** An issue was discovered in the Linux kernel before 5.6. svm_cpu_uninit in arch/x86/kvm/svm.c has a memory leak, aka CID-d80b64ff297e. NOTE: third parties dispute this issue because it's a one-time leak at the boot, the size is negligible, and it can't be triggered at will.
From the Ubuntu Security Team
It was discovered that the KVM implementation in the Linux kernel did not properly deallocate memory on initialization for some processors. A local attacker could possibly use this to cause a denial of service.
Priority
Status
Package | Release | Status |
---|---|---|
linux
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.13.0-16.19)
|
eoan |
Released
(5.3.0-62.56)
|
|
focal |
Released
(5.4.0-40.44)
|
|
trusty |
Ignored
(was needs-triage ESM criteria)
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Not vulnerable
(4.2.0-16.19)
|
|
Patches:
Introduced by
70cd94e60c733e3afc18b0e6aab789c13b5571da
|
||
linux-aws
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1001.1)
|
eoan |
Released
(5.3.0-1030.32)
|
|
focal |
Released
(5.4.0-1018.18)
|
|
trusty |
Ignored
(was needs-triage ESM criteria)
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Not vulnerable
(4.4.0-1001.10)
|
|
linux-aws-5.0
Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-aws-5.3
Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1030.32~18.04.1)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-aws-5.4
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1018.18~18.04.1)
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-aws-hwe
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Not vulnerable
(4.15.0-1030.31~16.04.1)
|
|
linux-azure
Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
eoan |
Released
(5.3.0-1032.33)
|
|
focal |
Released
(5.4.0-1020.20)
|
|
trusty |
Ignored
(was needs-triage ESM criteria)
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Not vulnerable
(4.11.0-1009.9)
|
|
linux-azure-4.15
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1082.92)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-azure-5.3
Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1032.33~18.04.1)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-azure-5.4
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1020.20~18.04.1)
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-azure-edge
Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-gcp
Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
eoan |
Released
(5.3.0-1030.32)
|
|
focal |
Released
(5.4.0-1019.19)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Not vulnerable
(4.10.0-1004.4)
|
|
linux-gcp-4.15
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1071.81)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-gcp-5.3
Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1030.32~18.04.1)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-gcp-5.4
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1019.19~18.04.2)
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-gcp-edge
Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-gke-4.15
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1030.32)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-gke-5.0
Launchpad, Ubuntu, Debian |
bionic |
Released
(5.0.0-1043.44)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-gke-5.3
Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1030.32~18.04.1)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-hwe
Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-62.56~18.04.1)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Not vulnerable
(4.8.0-36.36~16.04.1)
|
|
linux-hwe-5.4
Launchpad, Ubuntu, Debian |
bionic |
Released
(5.4.0-40.44~18.04.1)
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-hwe-edge
Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Ignored
(end of life, was needs-triage)
|
|
linux-kvm
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1002.2)
|
eoan |
Released
(5.3.0-1024.26)
|
|
focal |
Released
(5.4.0-1018.18)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Not vulnerable
(4.4.0-1004.9)
|
|
linux-lts-trusty
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-lts-xenial
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Ignored
(was needs-triage ESM criteria)
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-oem
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1002.3)
|
eoan |
Not vulnerable
(4.15.0-1035.40)
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Ignored
(end of standard support, was needs-triage)
|
|
linux-oem-5.6
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
eoan |
Does not exist
|
|
focal |
Not vulnerable
(5.6.0-1007.7)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-oem-osp1
Launchpad, Ubuntu, Debian |
bionic |
Released
(5.0.0-1063.68)
|
eoan |
Ignored
(end of life)
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-oracle
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1007.9)
|
eoan |
Released
(5.3.0-1028.30)
|
|
focal |
Released
(5.4.0-1019.19)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Not vulnerable
(4.15.0-1007.9~16.04.1)
|
|
linux-oracle-5.0
Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-oracle-5.3
Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1028.30~18.04.1)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-oracle-5.4
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1019.19~18.04.1)
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-raspi
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
eoan |
Does not exist
|
|
focal |
Released
(5.4.0-1013.13)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-raspi-5.4
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1013.13~18.04.1)
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-raspi2
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.13.0-1005.5)
|
eoan |
Released
(5.3.0-1028.30)
|
|
focal |
Ignored
(end of life, was needs-triage)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Not vulnerable
(4.2.0-1013.19)
|
|
linux-raspi2-5.3
Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1028.30~18.04.2)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-riscv
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
eoan |
Does not exist
|
|
focal |
Released
(5.4.0-28.32)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Does not exist
|
|
linux-snapdragon
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.4.0-1077.82)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.6~rc4)
|
|
xenial |
Not vulnerable
(4.4.0-1013.15)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 5.5 |
Attack vector | Local |
Attack complexity | Low |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
References
- https://git.kernel.org/linus/d80b64ff297e40c2b6f7d7abc1b3eba70d22a068 (5.6-rc4)
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d80b64ff297e40c2b6f7d7abc1b3eba70d22a068
- https://ubuntu.com/security/notices/USN-4411-1
- https://ubuntu.com/security/notices/USN-4412-1
- https://ubuntu.com/security/notices/USN-4413-1
- https://www.cve.org/CVERecord?id=CVE-2020-12768
- NVD
- Launchpad
- Debian