CVE-2021-20265

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 way memory resources were freed in the unix_stream_recvmsg function in the Linux kernel when a signal was pending. This flaw allows an unprivileged local user to crash the system by exhausting available memory. The highest threat from this vulnerability is to system availability.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1908827

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fa0dc04df259ba2df3ce1920e9690c7842f8fa4b

Details

Source: MITRE

Published: 2021-03-10

Updated: 2021-03-16

Type: CWE-400

Risk Information

CVSS v2

Base Score: 4.9

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

Impact Score: 6.9

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3

Base Score: 5.5

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

Impact Score: 3.6

Exploitability Score: 1.8

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*

Tenable Plugins

View all (7 total)

IDNameProductFamilySeverity
153271EulerOS 2.0 SP2 : kernel (EulerOS-SA-2021-2392)NessusHuawei Local Security Checks
high
151767EulerOS 2.0 SP5 : kernel (EulerOS-SA-2021-2221)NessusHuawei Local Security Checks
high
149245Oracle Linux 6 : kernel (ELSA-2021-9212)NessusOracle Linux 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