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CVE-2020-27825

Published: 11 December 2020

A use-after-free flaw was found in kernel/trace/ring_buffer.c in Linux kernel (before 5.10-rc1). There was a race problem in trace_open and resize of cpu buffer running parallely on different cpus, may cause a denial of service problem (DOS). This flaw could even allow a local attacker with special user privilege to a kernel information leak threat.

Priority

Medium

Cvss 3 Severity Score

5.7

Score breakdown

Status

Package Release Status
linux-hwe
Launchpad, Ubuntu, Debian
bionic Ignored
(replaced by linux-hwe-5.4)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.10~rc1)
xenial Not vulnerable
(4.8.0-36.36~16.04.1)
linux-hwe-5.4
Launchpad, Ubuntu, Debian
focal Does not exist

groovy Does not exist

trusty Does not exist

xenial Does not exist

bionic Not vulnerable
(5.4.0-37.41~18.04.1)
upstream
Released (5.10~rc1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-hwe-5.4)
trusty Does not exist

xenial Ignored
(superseded by linux-hwe)
focal Does not exist

groovy Does not exist

upstream
Released (5.10~rc1)
linux-lts-trusty
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

groovy Does not exist

trusty Does not exist

xenial Does not exist

upstream
Released (5.10~rc1)
linux-kvm
Launchpad, Ubuntu, Debian
trusty Does not exist

bionic Not vulnerable
(4.15.0-1002.2)
focal Not vulnerable
(5.4.0-1004.4)
groovy Not vulnerable
(5.4.0-1009.9)
upstream
Released (5.10~rc1)
xenial Not vulnerable
(4.4.0-1004.9)
linux-lts-xenial
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

groovy Does not exist

xenial Does not exist

trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.10~rc1)
linux-aws-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-aws-5.3)
focal Does not exist

groovy Does not exist

trusty Does not exist

xenial Does not exist

upstream
Released (5.10~rc1)
linux-aws-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-aws-5.4)
focal Does not exist

groovy Does not exist

trusty Does not exist

xenial Does not exist

upstream
Released (5.10~rc1)
linux-aws-5.4
Launchpad, Ubuntu, Debian
focal Does not exist

groovy Does not exist

trusty Does not exist

xenial Does not exist

bionic Not vulnerable
(5.4.0-1018.18~18.04.1)
upstream
Released (5.10~rc1)
linux-aws-hwe
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.10~rc1)
xenial Not vulnerable
(4.15.0-1030.31~16.04.1)
linux-azure
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-azure-5.3)
focal Not vulnerable
(5.4.0-1006.6)
groovy Not vulnerable
(5.4.0-1010.10)
trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.10~rc1)
xenial Not vulnerable
(4.11.0-1009.9)
linux-azure-4.15
Launchpad, Ubuntu, Debian
focal Does not exist

trusty Does not exist

xenial Does not exist

groovy Does not exist

bionic Not vulnerable
(4.15.0-1082.92)
upstream
Released (5.10~rc1)
linux-azure-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-azure-5.4)
focal Does not exist

groovy Does not exist

trusty Does not exist

xenial Does not exist

upstream
Released (5.10~rc1)
linux-azure-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

focal Does not exist

groovy Does not exist

xenial Does not exist

bionic Not vulnerable
(5.4.0-1020.20~18.04.1)
upstream
Released (5.10~rc1)
linux-azure-edge
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-azure-5.3)
focal Does not exist

groovy Does not exist

trusty Does not exist

xenial Does not exist

upstream
Released (5.10~rc1)
linux-gcp
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-gcp-5.3)
trusty Does not exist

focal Not vulnerable
(5.4.0-1005.5)
groovy Not vulnerable
(5.4.0-1009.9)
upstream
Released (5.10~rc1)
xenial Not vulnerable
(4.10.0-1004.4)
linux-gcp-4.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

groovy Does not exist

bionic Not vulnerable
(4.15.0-1071.81)
upstream
Released (5.10~rc1)
linux-gcp-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-gcp-5.4)
focal Does not exist

groovy Does not exist

trusty Does not exist

xenial Does not exist

upstream
Released (5.10~rc1)
linux-gcp-5.4
Launchpad, Ubuntu, Debian
focal Does not exist

groovy Does not exist

trusty Does not exist

xenial Does not exist

bionic Not vulnerable
(5.4.0-1019.19~18.04.2)
upstream
Released (5.10~rc1)
linux-gcp-edge
Launchpad, Ubuntu, Debian
trusty Does not exist

bionic Ignored
(superseded by linux-gcp-5.3)
focal Does not exist

groovy Does not exist

xenial Does not exist

upstream
Released (5.10~rc1)
linux-gke-4.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

groovy Does not exist

bionic Not vulnerable
(4.15.0-1030.32)
upstream
Released (5.10~rc1)
linux-gke-5.0
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

groovy Does not exist

bionic Not vulnerable
(5.0.0-1011.11~18.04.1)
upstream
Released (5.10~rc1)
linux-gke-5.3
Launchpad, Ubuntu, Debian
focal Does not exist

groovy Does not exist

trusty Does not exist

xenial Does not exist

bionic Not vulnerable
(5.3.0-1011.12~18.04.1)
upstream
Released (5.10~rc1)
linux-oracle
Launchpad, Ubuntu, Debian
trusty Does not exist

bionic Not vulnerable
(4.15.0-1007.9)
focal Not vulnerable
(5.4.0-1005.5)
groovy Not vulnerable
(5.4.0-1009.9)
upstream
Released (5.10~rc1)
xenial Not vulnerable
(4.15.0-1007.9~16.04.1)
linux-oracle-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-oracle-5.3)
focal Does not exist

groovy Does not exist

trusty Does not exist

xenial Does not exist

upstream
Released (5.10~rc1)
linux-oracle-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-oracle-5.4)
trusty Does not exist

xenial Does not exist

focal Does not exist

groovy Does not exist

upstream
Released (5.10~rc1)
linux-oracle-5.4
Launchpad, Ubuntu, Debian
focal Does not exist

groovy Does not exist

trusty Does not exist

xenial Does not exist

bionic Not vulnerable
(5.4.0-1019.19~18.04.1)
upstream
Released (5.10~rc1)
linux-oem
Launchpad, Ubuntu, Debian
focal Does not exist

groovy Does not exist

trusty Does not exist

xenial Ignored
(end of standard support)
bionic Ignored
(end of life, was needs-triage)
upstream
Released (5.10~rc1)
linux-oem-5.6
Launchpad, Ubuntu, Debian
bionic Does not exist

groovy Does not exist

trusty Does not exist

xenial Does not exist

focal Not vulnerable
(5.6.0-1007.7)
upstream
Released (5.10~rc1)
linux-oem-osp1
Launchpad, Ubuntu, Debian
focal Does not exist

groovy Does not exist

trusty Does not exist

xenial Does not exist

bionic Ignored
(end of standard support, was needs-triage)
upstream
Released (5.10~rc1)
linux-raspi
Launchpad, Ubuntu, Debian
bionic Does not exist

trusty Does not exist

xenial Does not exist

focal Not vulnerable
(5.4.0-1007.7)
groovy Not vulnerable
(5.4.0-1008.8)
upstream
Released (5.10~rc1)
linux-raspi2
Launchpad, Ubuntu, Debian
focal Ignored
(replaced by linux-raspi)
trusty Does not exist

groovy Does not exist

bionic Not vulnerable
(4.13.0-1005.5)
upstream
Released (5.10~rc1)
xenial Not vulnerable
(4.2.0-1013.19)
linux-raspi2-5.3
Launchpad, Ubuntu, Debian
focal Does not exist

groovy Does not exist

trusty Does not exist

xenial Does not exist

bionic Not vulnerable
(5.3.0-1017.19~18.04.1)
upstream
Released (5.10~rc1)
linux-raspi-5.4
Launchpad, Ubuntu, Debian
focal Does not exist

groovy Does not exist

trusty Does not exist

xenial Does not exist

bionic Not vulnerable
(5.4.0-1013.13~18.04.1)
upstream
Released (5.10~rc1)
linux-riscv
Launchpad, Ubuntu, Debian
bionic Does not exist

trusty Does not exist

xenial Does not exist

focal Not vulnerable
(5.4.0-24.28)
groovy Not vulnerable
(5.4.0-24.28)
upstream
Released (5.10~rc1)
linux-snapdragon
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.4.0-1077.82)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.10~rc1)
xenial Not vulnerable
(4.4.0-1013.15)
linux-hwe-5.8
Launchpad, Ubuntu, Debian
trusty Does not exist

bionic Does not exist

groovy Does not exist

focal Not vulnerable
(5.8.0-23.24~20.04.1)
upstream
Released (5.10~rc1)
xenial Does not exist

linux-gke-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

focal Does not exist

bionic Not vulnerable
(5.4.0-1025.25~18.04.1)
groovy Does not exist

upstream
Released (5.10~rc1)
xenial Does not exist

linux
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.13.0-16.19)
focal Not vulnerable
(5.4.0-9.12)
groovy Not vulnerable
(5.4.0-26.30)
trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.10~rc1)
xenial Not vulnerable
(4.2.0-16.19)
Patches:
Introduced by

b23d7a5f4a07af02343cdd28fe1f7488bac3afda

Fixed by bbeb97464eefc65f506084fd9f18f21653e01137
linux-aws
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1001.1)
focal Not vulnerable
(5.4.0-1005.5)
groovy Not vulnerable
(5.4.0-1009.9)
trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.10~rc1)
xenial Not vulnerable
(4.4.0-1001.10)
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 (5.10~rc1)
xenial Does not exist

Severity score breakdown

Parameter Value
Base score 5.7
Attack vector Local
Attack complexity High
Privileges required High
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:H