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 |
focal |
Released
(5.4.0-40.44)
|
| upstream |
Released
(5.6~rc4)
|
|
| trusty |
Ignored
(was needs-triage ESM criteria)
|
|
| xenial |
Not vulnerable
(4.2.0-16.19)
|
|
| bionic |
Not vulnerable
(4.13.0-16.19)
|
|
| eoan |
Released
(5.3.0-62.56)
|
|
|
Patches: Introduced by 70cd94e60c733e3afc18b0e6aab789c13b5571da |
||
|
linux-kvm Launchpad, Ubuntu, Debian |
focal |
Released
(5.4.0-1018.18)
|
| bionic |
Not vulnerable
(4.15.0-1002.2)
|
|
| eoan |
Released
(5.3.0-1024.26)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.6~rc4)
|
|
| xenial |
Not vulnerable
(4.4.0-1004.9)
|
|
|
linux-aws Launchpad, Ubuntu, Debian |
focal |
Released
(5.4.0-1018.18)
|
| upstream |
Released
(5.6~rc4)
|
|
| trusty |
Ignored
(was needs-triage ESM criteria)
|
|
| xenial |
Not vulnerable
(4.4.0-1001.10)
|
|
| bionic |
Not vulnerable
(4.15.0-1001.1)
|
|
| eoan |
Released
(5.3.0-1030.32)
|
|
|
linux-azure Launchpad, Ubuntu, Debian |
focal |
Released
(5.4.0-1020.20)
|
| upstream |
Released
(5.6~rc4)
|
|
| trusty |
Ignored
(was needs-triage ESM criteria)
|
|
| xenial |
Not vulnerable
(4.11.0-1009.9)
|
|
| bionic |
Ignored
(end of life, was needs-triage)
|
|
| eoan |
Released
(5.3.0-1032.33)
|
|
|
linux-gcp Launchpad, Ubuntu, Debian |
focal |
Released
(5.4.0-1019.19)
|
| bionic |
Ignored
(end of life, was needs-triage)
|
|
| eoan |
Released
(5.3.0-1030.32)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.6~rc4)
|
|
| xenial |
Not vulnerable
(4.10.0-1004.4)
|
|
|
linux-oracle Launchpad, Ubuntu, Debian |
focal |
Released
(5.4.0-1019.19)
|
| bionic |
Not vulnerable
(4.15.0-1007.9)
|
|
| eoan |
Released
(5.3.0-1028.30)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.6~rc4)
|
|
| xenial |
Not vulnerable
(4.15.0-1007.9~16.04.1)
|
|
|
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-aws-5.0 Launchpad, Ubuntu, Debian |
upstream |
Released
(5.6~rc4)
|
| trusty |
Does not exist
|
|
| xenial |
Does not exist
|
|
| bionic |
Ignored
(end of life, was needs-triage)
|
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
|
linux-aws-hwe Launchpad, Ubuntu, Debian |
upstream |
Released
(5.6~rc4)
|
| trusty |
Does not exist
|
|
| xenial |
Not vulnerable
(4.15.0-1030.31~16.04.1)
|
|
| bionic |
Does not exist
|
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
|
linux-aws-5.3 Launchpad, Ubuntu, Debian |
upstream |
Released
(5.6~rc4)
|
| trusty |
Does not exist
|
|
| bionic |
Released
(5.3.0-1030.32~18.04.1)
|
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| xenial |
Does not exist
|
|
|
linux-gcp-5.4 Launchpad, Ubuntu, Debian |
upstream |
Released
(5.6~rc4)
|
| trusty |
Does not exist
|
|
| xenial |
Does not exist
|
|
| bionic |
Not vulnerable
(5.4.0-1019.19~18.04.2)
|
|
| focal |
Does not exist
|
|
|
linux-aws-5.4 Launchpad, Ubuntu, Debian |
upstream |
Released
(5.6~rc4)
|
| trusty |
Does not exist
|
|
| xenial |
Does not exist
|
|
| bionic |
Not vulnerable
(5.4.0-1018.18~18.04.1)
|
|
| focal |
Does not exist
|
|
|
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-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-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-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-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-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://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12768
- 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
- NVD
- Launchpad
- Debian