CVE-2020-25656

MEDIUM
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

A flaw was found in the Linux kernel. A use-after-free was found in the way the console subsystem was using ioctls KDGKBSENT and KDSKBSENT. A local user could use this flaw to get read memory access out of bounds. The highest threat from this vulnerability is to data confidentiality.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1888726

https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html

https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html

https://lkml.org/lkml/2020/10/16/84

https://lkml.org/lkml/2020/10/29/528

Details

Source: MITRE

Published: 2020-12-02

Updated: 2020-12-18

Type: CWE-416

Risk Information

CVSS v2

Base Score: 1.9

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

Impact Score: 2.9

Exploitability Score: 3.4

Severity: LOW

CVSS v3

Base Score: 4.1

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

Impact Score: 3.6

Exploitability Score: 0.5

Severity: MEDIUM

Tenable Plugins

View all (41 total)

IDNameProductFamilySeverity
150536SUSE SLES11 Security Update : kernel (SUSE-SU-2021:14630-1)NessusSuSE Local Security Checks
high
149098EulerOS 2.0 SP3 : kernel (EulerOS-SA-2021-1808)NessusHuawei Local Security Checks
high
147978Ubuntu 20.04 LTS / 20.10 : Linux kernel vulnerabilities (USN-4751-1)NessusUbuntu Local Security Checks
high
147885CentOS 7 : kernel (CESA-2021:0856)NessusCentOS Local Security Checks
high
147861Oracle Linux 7 : kernel (ELSA-2021-0856)NessusOracle Linux Local Security Checks
high
147835RHEL 7 : kernel (RHSA-2021:0856)NessusRed Hat Local Security Checks
high
147827RHEL 7 : kernel-rt (RHSA-2021:0857)NessusRed Hat Local Security Checks
high
147690EulerOS Virtualization 2.9.0 : kernel (EulerOS-SA-2021-1642)NessusHuawei Local Security Checks
high
147512EulerOS Virtualization 2.9.1 : kernel (EulerOS-SA-2021-1604)NessusHuawei Local Security Checks
high
146701EulerOS 2.0 SP2 : kernel (EulerOS-SA-2021-1311)NessusHuawei Local Security Checks
high
146282openSUSE Security Update : RT kernel (openSUSE-2021-242)NessusSuSE Local Security Checks
high
146181EulerOS 2.0 SP5 : kernel (EulerOS-SA-2021-1200)NessusHuawei Local Security Checks
high
145005Amazon Linux AMI : kernel (ALAS-2021-1461)NessusAmazon Linux Local Security Checks
medium
144752Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-4681-1)NessusUbuntu Local Security Checks
high
144750Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-4679-1)NessusUbuntu Local Security Checks
medium
144749Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4680-1)NessusUbuntu Local Security Checks
medium
144731EulerOS Virtualization for ARM 64 3.0.2.0 : kernel (EulerOS-SA-2021-1039)NessusHuawei Local Security Checks
high
144494Debian DLA-2494-1 : linux security updateNessusDebian Local Security Checks
high
144464Amazon Linux AMI : kernel (ALAS-2020-1462) (deprecated)NessusAmazon Linux Local Security Checks
high
144210Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2020-5996)NessusOracle Linux Local Security Checks
high
144207Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2020-5995)NessusOracle Linux Local Security Checks
high
144168EulerOS 2.0 SP8 : kernel (EulerOS-SA-2020-2514)NessusHuawei Local Security Checks
medium
144097Debian DLA-2483-1 : linux-4.19 security updateNessusDebian Local Security Checks
high
143875SUSE SLES15 Security Update : kernel (SUSE-SU-2020:3532-1)NessusSuSE Local Security Checks
high
143858SUSE SLES12 Security Update : kernel (SUSE-SU-2020:3326-1)NessusSuSE Local Security Checks
high
143857SUSE SLES12 Security Update : kernel (SUSE-SU-2020:3544-1)NessusSuSE Local Security Checks
high
143809SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2020:3272-1)NessusSuSE Local Security Checks
high
143802SUSE SLES15 Security Update : kernel (SUSE-SU-2020:3513-1)NessusSuSE Local Security Checks
high
143780SUSE SLES15 Security Update : kernel (SUSE-SU-2020:3522-1)NessusSuSE Local Security Checks
high
143773SUSE SLES12 Security Update : kernel (SUSE-SU-2020:3281-1)NessusSuSE Local Security Checks
high
143654SUSE SLES12 Security Update : kernel (SUSE-SU-2020:3501-1)NessusSuSE Local Security Checks
high
143639SUSE SLES12 Security Update : kernel (SUSE-SU-2020:3503-1)NessusSuSE Local Security Checks
high
143629SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2020:3273-1)NessusSuSE Local Security Checks
medium
143589Amazon Linux 2 : kernel (ALAS-2020-1566)NessusAmazon Linux Local Security Checks
medium
143411EulerOS 2.0 SP9 : kernel (EulerOS-SA-2020-2498)NessusHuawei Local Security Checks
medium
143408EulerOS 2.0 SP9 : kernel (EulerOS-SA-2020-2485)NessusHuawei Local Security Checks
medium
143398openSUSE Security Update : the Linux Kernel (openSUSE-2020-2112)NessusSuSE Local Security Checks
high
142945openSUSE Security Update : the Linux Kernel (openSUSE-2020-1906)NessusSuSE Local Security Checks
high
142934Fedora 32 : kernel / kernel-headers / kernel-tools (2020-e211716d08)NessusFedora Local Security Checks
medium
142921openSUSE Security Update : the Linux Kernel (openSUSE-2020-1901)NessusSuSE Local Security Checks
high
142919Fedora 33 : kernel / kernel-headers / kernel-tools (2020-98ccae320c)NessusFedora Local Security Checks
medium