CVE-2020-11884

high
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

In the Linux kernel 4.19 through 5.6.7 on the s390 platform, code execution may occur because of a race condition, as demonstrated by code in enable_sacf_uaccess in arch/s390/lib/uaccess.c that fails to protect against a concurrent page table upgrade, aka CID-3f777e19d171. A crash could also occur.

References

https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=215d1f3928713d6eaec67244bcda72105b898000

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3f777e19d171670ab558a6d5e6b1ac7f9b6c574f

https://lists.fedoraproject.org/archives/list/[email protected]/message/3TZBP2HINNAX7HKHCOUMIFVQPV6GWMCZ/

https://lists.fedoraproject.org/archives/list/[email protected]/message/AQUVKC3IPUC5B374VVAZV4J5P3GAUGSW/

https://lists.fedoraproject.org/archives/list/[email protected]/message/ZKVJMS4GQRH5SO35WM5GINCFAGXQ3ZW6/

https://security.netapp.com/advisory/ntap-20200608-0001/

https://usn.ubuntu.com/4342-1/

https://usn.ubuntu.com/4343-1/

https://usn.ubuntu.com/4345-1/

https://www.debian.org/security/2020/dsa-4667

Details

Source: MITRE

Published: 2020-04-29

Updated: 2021-01-04

Type: CWE-362

Risk Information

CVSS v2

Base Score: 6.9

Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 3.4

Severity: MEDIUM

CVSS v3

Base Score: 7

Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 1

Severity: HIGH

Vulnerable Software

Configuration 1

OR

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to 5.6.7 (inclusive)

Configuration 2

OR

cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*

cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*

cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*

Configuration 3

OR

cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

Configuration 4

OR

cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*

cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*

cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*

Tenable Plugins

View all (14 total)

IDNameProductFamilySeverity
145913CentOS 8 : kernel (CESA-2020:2102)NessusCentOS Local Security Checks
high
138766NewStart CGSL MAIN 6.01 : kernel Multiple Vulnerabilities (NS-SA-2020-0030)NessusNewStart CGSL Local Security Checks
critical
137275RHEL 8 : kernel (RHSA-2020:2429)NessusRed Hat Local Security Checks
high
137190Photon OS 3.0: Linux PHSA-2020-3.0-0100NessusPhotonOS Local Security Checks
medium
136870EulerOS 2.0 SP8 : kernel (EulerOS-SA-2020-1592)NessusHuawei Local Security Checks
high
136717RHEL 8 : kernel (RHSA-2020:2199)NessusRed Hat Local Security Checks
high
136646Oracle Linux 8 : kernel (ELSA-2020-2102)NessusOracle Linux Local Security Checks
high
136526RHEL 8 : kernel (RHSA-2020:2102)NessusRed Hat Local Security Checks
high
136298Fedora 31 : kernel (2020-b453269c4e)NessusFedora Local Security Checks
high
136295Fedora 30 : kernel (2020-64d46a6e29)NessusFedora Local Security Checks
high
136124Debian DSA-4667-1 : linux - security updateNessusDebian Local Security Checks
high
136088Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4345-1)NessusUbuntu Local Security Checks
high
136086Ubuntu 20.04 : Linux kernel vulnerability (USN-4343-1)NessusUbuntu Local Security Checks
high
136085Ubuntu 18.04 LTS / 19.10 : Linux kernel vulnerabilities (USN-4342-1)NessusUbuntu Local Security Checks
high