What is CVE-2018-16882?

CVE-2018-16882 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10, classified as a Use After Free flaw (CWE-416). CVE-2018-16882 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2018-16882?

CVE-2018-16882 has a CVSS score of 8.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Is there a patch available for CVE-2018-16882?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2018-16882 patch availability.

Is CVE-2018-16882 actively exploited?

CVE-2018-16882 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2018-16882

High

A use-after-free issue was found in the way the Linux kernel's KVM hypervisor processed posted interrupts when nested(=1) virtualization is enabled. In nested_get_vmcs12_pages(), in case of an error while processing posted interrupt address, it unmaps the 'pi_desc_page' without resetting 'pi_desc' descriptor address, which is later used in pi_test_and_clear_on(). A guest user/process could use this flaw to crash the host kernel resulting in DoS or potentially gain privileged access to a system. Kernel versions before 4.14.91 and before 4.19.13 are vulnerable.

Package Linux Kernel

Published 2019-01-03

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

8.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2018-16882 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

References

13 total

Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16882

Issue Tracking Patch Third Party Advisory
Marc
https://marc.info/?l=kvm&m=154514994222809&w=2

Patch Third Party Advisory
Securityfocus
http://www.securityfocus.com/bid/106254

Third Party Advisory VDB Entry
Lwn
https://lwn.net/Articles/775720/

Third Party Advisory
Lwn
https://lwn.net/Articles/775721/

Third Party Advisory

Showing 5 of 13 references View all on NVD

Details

CVE ID CVE-2018-16882

Severity High

CVSS score 8.8 / 10

CVSS version 3.1

Published 2019-01-03

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2018-16882?

CVE-2018-16882 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10 , classified as an Use After Free flaw (CWE-416) . CVE-2018-16882 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2018-16882?

CVE-2018-16882 has a CVSS score of 8.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
Is there a patch available for CVE-2018-16882?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2018-16882 patch availability.
Is CVE-2018-16882 actively exploited?

No. CVE-2018-16882 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.