CVE-2021-30178

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

An issue was discovered in the Linux kernel through 5.11.11. synic_get in arch/x86/kvm/hyperv.c has a NULL pointer dereference for certain accesses to the SynIC Hyper-V context, aka CID-919f4ebc5987.

References

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=919f4ebc598701670e80e31573a58f1f2d2bf918

https://lists.fedoraproject.org/archives/list/[email protected]/message/TGQDVYCDM3F5VXUZIADIV2ERL3AJXNJS/

https://lists.fedoraproject.org/archives/list/[email protected]/message/W5YFGIIF24475A2LNW3UWHW2SNCS3G7M/

https://lists.fedoraproject.org/archives/list/[email protected]/message/IJ5GEETMX3ERQ4DF3GSS2XPNSOOK44OB/

Details

Source: MITRE

Published: 2021-04-07

Updated: 2021-06-04

Type: CWE-476

Risk Information

CVSS v2

Base Score: 2.1

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

Impact Score: 2.9

Exploitability Score: 3.9

Severity: LOW

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

Tenable Plugins

View all (2 total)

IDNameProductFamilySeverity
148741Fedora 32 : kernel (2021-57a7ba61f8)NessusFedora Local Security Checks
medium
148723Fedora 33 : kernel (2021-e71c033f88)NessusFedora Local Security Checks
high