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CVE-2020-10942

Published: 24 March 2020

In the Linux kernel before 5.5.8, get_raw_socket in drivers/vhost/net.c lacks validation of an sk_family field, which might allow attackers to trigger kernel stack corruption via crafted system calls.

From the Ubuntu Security Team

It was discovered that the vhost net driver in the Linux kernel contained a stack buffer overflow. A local attacker with the ability to perform ioctl() calls on /dev/vhost-net could use this to cause a denial of service (system crash).

Priority

Medium

Cvss 3 Severity Score

5.3

Score breakdown

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-99.100)
eoan
Released (5.3.0-51.44)
focal Not vulnerable
(5.4.0-18.22)
trusty Ignored
(was needed ESM criteria)
upstream
Released (5.6~rc4)
xenial
Released (4.4.0-179.209)
Patches:
Introduced by

3a4d5c94e959359ece6d6b55045c3f046677f55c

Fixed by 42d84c8490f9f0931786f1623191fcab397c3d64
linux-hwe
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-51.44~18.04.2)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.6~rc4)
xenial
Released (4.15.0-99.100~16.04.1)
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-oem
Launchpad, Ubuntu, Debian
focal Does not exist

bionic
Released (4.15.0-1080.90)
eoan Ignored
(end of life, was pending)
trusty Does not exist

upstream
Released (5.6~rc4)
xenial Ignored
(end of standard support, was needs-triage)
linux-aws
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1066.70)
eoan
Released (5.3.0-1017.18)
trusty
Released (4.4.0-1067.71)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (5.6~rc4)
xenial
Released (4.4.0-1107.118)
focal Not vulnerable
(5.4.0-1005.5)
linux-kvm
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1059.60)
eoan
Released (5.3.0-1016.17)
focal Not vulnerable
(5.4.0-1004.4)
trusty Does not exist

upstream
Released (5.6~rc4)
xenial
Released (4.4.0-1071.78)
linux-oem-osp1
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1050.55)
eoan Ignored
(end of life, was pending)
focal Does not exist

trusty Does not exist

upstream
Released (5.6~rc4)
xenial Does not exist

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-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
Released (4.15.0-1066.70~16.04.1)
linux-aws-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1017.18~18.04.1)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.6~rc4)
xenial Does not exist

linux-azure-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-gcp-4.15
Launchpad, Ubuntu, Debian
eoan Does not exist

bionic Not vulnerable
(4.15.0-1071.81)
focal Does not exist

trusty Does not exist

upstream
Released (5.6~rc4)
xenial Does not exist

linux-azure
Launchpad, Ubuntu, Debian
bionic Ignored
(end of life, was needed)
eoan
Released (5.3.0-1020.21)
focal Not vulnerable
(5.4.0-1006.6)
trusty Ignored
(was needed ESM criteria)
upstream
Released (5.6~rc4)
xenial
Released (4.15.0-1082.92~16.04.1)
linux-azure-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1020.21~18.04.1)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.6~rc4)
xenial Does not exist

linux-azure-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 needed)
eoan
Released (5.3.0-1018.19)
focal Not vulnerable
(5.4.0-1005.5)
trusty Does not exist

upstream
Released (5.6~rc4)
xenial
Released (4.15.0-1061.65)
linux-gcp-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1018.19~18.04.1)
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
Released (4.15.0-1058.61)
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 (5.0.0-1035.36)
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 (5.3.0-1018.19~18.04.1)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.6~rc4)
xenial Does not exist

linux-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
Released (4.4.0-179.209~14.04.1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (5.6~rc4)
xenial Does not exist

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-oracle
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1038.42)
eoan
Released (5.3.0-1016.18)
focal Not vulnerable
(5.4.0-1005.5)
trusty Does not exist

upstream
Released (5.6~rc4)
xenial
Released (4.15.0-1038.42~16.04.1)
linux-oracle-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(end of life, was needed)
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 (5.3.0-1016.18~18.04.1)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.6~rc4)
xenial Does not exist

linux-raspi
Launchpad, Ubuntu, Debian
bionic Does not exist

eoan Does not exist

focal Not vulnerable
(5.4.0-1007.7)
trusty Does not exist

upstream
Released (5.6~rc4)
xenial Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1061.65)
eoan
Released (5.3.0-1023.25)
focal Ignored
(end of life, was needs-triage)
trusty Does not exist

upstream
Released (5.6~rc4)
xenial
Released (4.4.0-1133.142)
linux-raspi2-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1023.25~18.04.1)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.6~rc4)
xenial Does not exist

linux-riscv
Launchpad, Ubuntu, Debian
bionic Does not exist

eoan Does not exist

focal Not vulnerable
(5.4.0-24.28)
trusty Does not exist

upstream
Released (5.6~rc4)
xenial Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1077.84)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.6~rc4)
xenial
Released (4.4.0-1137.145)

Severity score breakdown

Parameter Value
Base score 5.3
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact Low
Availability impact High
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H