CVE-2020-27825

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 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.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1905155

https://www.debian.org/security/2021/dsa-4843

https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html

https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html

https://security.netapp.com/advisory/ntap-20210521-0008/

Details

Source: MITRE

Published: 2020-12-11

Updated: 2021-05-21

Type: CWE-362

Risk Information

CVSS v2

Base Score: 5.4

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

Impact Score: 7.8

Exploitability Score: 3.4

Severity: MEDIUM

CVSS v3

Base Score: 5.7

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

Impact Score: 5.2

Exploitability Score: 0.5

Severity: MEDIUM

Tenable Plugins

View all (18 total)

IDNameProductFamilySeverity
147532Debian DLA-2586-1 : linux security updateNessusDebian Local Security Checks
high
146631Amazon Linux 2 : kernel (ALAS-2021-1600)NessusAmazon Linux Local Security Checks
high
146569Amazon Linux AMI : kernel (ALAS-2021-1480)NessusAmazon Linux Local Security Checks
high
146512Debian DLA-2557-1 : linux-4.19 security updateNessusDebian Local Security Checks
high
146511SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0452-1)NessusSuSE Local Security Checks
high
146476SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0437-1)NessusSuSE Local Security Checks
high
146474SUSE SLES15 Security Update : kernel (SUSE-SU-2021:0438-1)NessusSuSE Local Security Checks
high
146470SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0434-1)NessusSuSE Local Security Checks
high
146282openSUSE Security Update : RT kernel (openSUSE-2021-242)NessusSuSE Local Security Checks
high
146052Debian DSA-4843-1 : linux - security updateNessusDebian Local Security Checks
high
145320openSUSE Security Update : the Linux Kernel (openSUSE-2021-60)NessusSuSE Local Security Checks
medium
145287openSUSE Security Update : the Linux Kernel (openSUSE-2021-75)NessusSuSE Local Security Checks
medium
145120SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0133-1)NessusSuSE Local Security Checks
medium
145025SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2021:0117-1)NessusSuSE Local Security Checks
medium
145018SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2021:0118-1)NessusSuSE Local Security Checks
medium
144959SUSE SLES15 Security Update : kernel (SUSE-SU-2021:0108-1)NessusSuSE Local Security Checks
medium
144914SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0098-1)NessusSuSE Local Security Checks
high
144908SUSE SLES15 Security Update : kernel (SUSE-SU-2021:0095-1)NessusSuSE Local Security Checks
medium