CVE-2020-14356
Published: 19 August 2020
A flaw null pointer dereference in the Linux kernel cgroupv2 subsystem in versions before 5.7.10 was found in the way when reboot the system. A local user could use this flaw to crash the system or escalate their privileges on the system.
From the Ubuntu Security Team
It was discovered that the cgroup v2 subsystem in the Linux kernel did not properly perform reference counting in some situations, leading to a NULL pointer dereference. A local attacker could use this to cause a denial of service or possibly gain administrative privileges.
Notes
| Author | Note |
|---|---|
| sbeattie |
commit 1bfba2f4270c64c912 is in the linux-stable tree hash |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
linux
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-118.119)
|
| focal |
Released
(5.4.0-45.49)
|
|
| groovy |
Not vulnerable
(5.8.0-16.17)
|
|
| trusty |
Ignored
(was needs-triage ESM criteria)
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Not vulnerable
(4.2.0-16.19)
|
|
|
Patches:
Introduced by
ad0f75e5f57ccbceec13274e1e242f2b5a6397ed
Introduced by
bd1060a1d67128bb8fbe2e1384c518912cbe54e7
Introduced by
ad0f75e5f57ccbceec13274e1e242f2b5a6397ed
|
||
|
linux-aws
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1083.87)
|
| focal |
Released
(5.4.0-1022.22)
|
|
| groovy |
Not vulnerable
(5.8.0-1004.4)
|
|
| trusty |
Ignored
(was needs-triage ESM criteria)
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Not vulnerable
(4.4.0-1001.10)
|
|
|
linux-aws-5.0
Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-aws-5.3
Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1034.36)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-aws-5.4
Launchpad, Ubuntu, Debian |
bionic |
Released
(5.4.0-1022.22~18.04.1)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-aws-hwe
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Released
(4.15.0-1083.87~16.04.1)
|
|
|
linux-azure
Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
| focal |
Released
(5.4.0-1023.23)
|
|
| groovy |
Not vulnerable
(5.8.0-1004.4)
|
|
| trusty |
Released
(4.15.0-1096.106~14.04.1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Released
(4.15.0-1096.106~16.04.1)
|
|
|
linux-azure-4.15
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1096.106)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-azure-5.3
Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-azure-5.4
Launchpad, Ubuntu, Debian |
bionic |
Released
(5.4.0-1023.23~18.04.1)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-azure-edge
Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-dell300x
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1005.8)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-gcp
Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
| focal |
Released
(5.4.0-1022.22)
|
|
| groovy |
Not vulnerable
(5.8.0-1002.2)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Released
(4.15.0-1084.95~16.04.1)
|
|
|
linux-gcp-4.15
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1084.95)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-gcp-5.3
Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-gcp-5.4
Launchpad, Ubuntu, Debian |
bionic |
Released
(5.4.0-1022.22~18.04.1)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-gcp-edge
Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-gke-4.15
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1070.73)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-gke-5.0
Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of standard support, was needed)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-gke-5.3
Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1034.36)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-gke-5.4
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1025.25~18.04.1)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-gkeop
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Not vulnerable
(5.4.0-1008.9)
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-gkeop-5.4
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.4.0-1001.1)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-hwe
Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-66.60)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Released
(4.15.0-118.119~16.04.1)
|
|
|
linux-hwe-5.4
Launchpad, Ubuntu, Debian |
bionic |
Released
(5.4.0-45.49~18.04.2)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-hwe-5.8
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Not vulnerable
(5.8.0-23.24~20.04.1)
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-hwe-edge
Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Ignored
(end of life, was needs-triage)
|
|
|
linux-kvm
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1075.76)
|
| focal |
Released
(5.4.0-1021.21)
|
|
| groovy |
Not vulnerable
(5.8.0-1001.1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Not vulnerable
(4.4.0-1004.9)
|
|
|
linux-lts-trusty
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-xenial
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Ignored
(was needs-triage ESM criteria)
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-oem
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1097.107)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Ignored
(end of standard support, was needs-triage)
|
|
|
linux-oem-5.10
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Not vulnerable
(5.10.0-1008.9)
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-oem-5.6
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Released
(5.6.0-1021.21)
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-oem-osp1
Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of standard support, was needed)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-oracle
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1054.58)
|
| focal |
Released
(5.4.0-1022.22)
|
|
| groovy |
Not vulnerable
(5.8.0-1001.1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Released
(4.15.0-1054.58~16.04.1)
|
|
|
linux-oracle-5.0
Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-oracle-5.3
Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-oracle-5.4
Launchpad, Ubuntu, Debian |
bionic |
Released
(5.4.0-1022.22~18.04.1)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-raspi
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Released
(5.4.0-1016.17)
|
|
| groovy |
Not vulnerable
(5.4.0-1016.17)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-raspi-5.4
Launchpad, Ubuntu, Debian |
bionic |
Released
(5.4.0-1016.17~18.04.1)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-raspi2
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1071.75)
|
| focal |
Ignored
(end of life, was needs-triage)
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Not vulnerable
(4.2.0-1013.19)
|
|
|
linux-raspi2-5.3
Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1032.34)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-riscv
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Released
(5.4.0-31.35)
|
|
| groovy |
Not vulnerable
(5.8.0-1.1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Does not exist
|
|
|
linux-snapdragon
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1087.95)
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc5)
|
|
| xenial |
Not vulnerable
(4.4.0-1013.15)
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.8 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
References
- https://bugzilla.kernel.org/show_bug.cgi?id=208003
- https://lore.kernel.org/netdev/CAM_iQpUKQJrj8wE+Qa8NGR3P0L+5Uz=qo-O5+k_P60HzTde6aw%40mail.gmail.com/t/
- https://ubuntu.com/security/notices/USN-4483-1
- https://ubuntu.com/security/notices/USN-4484-1
- https://ubuntu.com/security/notices/USN-4526-1
- https://www.cve.org/CVERecord?id=CVE-2020-14356
- NVD
- Launchpad
- Debian