CVE-2021-3501

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

A flaw was found in the Linux kernel in versions before 5.12. The value of internal.ndata, in the KVM API, is mapped to an array index, which can be updated by a user process at anytime which could lead to an out-of-bounds write. The highest threat from this vulnerability is to data integrity and system availability.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1950136

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=04c4f2ee3f68c9a4bf1653d15f1a9a435ae33f7a

https://security.netapp.com/advisory/ntap-20210618-0008/

Details

Source: MITRE

Published: 2021-05-06

Updated: 2021-06-18

Type: CWE-787

Risk Information

CVSS v2

Base Score: 3.6

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

Impact Score: 4.9

Exploitability Score: 3.9

Severity: LOW

CVSS v3

Base Score: 7.1

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

Impact Score: 5.2

Exploitability Score: 1.8

Severity: HIGH

Tenable Plugins

View all (7 total)

IDNameProductFamilySeverity
150950RHEL 8 : Red Hat Virtualization Host security update [ovirt-4.4.6] (Important) (RHSA-2021:2522)NessusRed Hat Local Security Checks
high
150296RHEL 8 : kpatch-patch (RHSA-2021:2165)NessusRed Hat Local Security Checks
high
150295RHEL 8 : kernel (RHSA-2021:2168)NessusRed Hat Local Security Checks
medium
150289RHEL 8 : kernel-rt (RHSA-2021:2169)NessusRed Hat Local Security Checks
medium
150234Ubuntu 20.04 LTS : Linux kernel (OEM) vulnerabilities (USN-4983-1)NessusUbuntu Local Security Checks
high
150151Ubuntu 21.04 : Linux kernel vulnerabilities (USN-4977-1)NessusUbuntu Local Security Checks
high
150145Oracle Linux 8 : kernel (ELSA-2021-2168)NessusOracle Linux Local Security Checks
medium