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CVE-2018-16882

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CVE-2018-16882

Published: Jan 3, 2019

Modified: Aug 5, 2024

PUBLISHED

CVSS v3.0

6.1

MEDIUM

Description

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.

VendorProductVersions

The Linux Foundation

kernel:

affected
before 4.14.91
affected
before 4.19.13

Weaknesses (CWE)

CWE-416

CVSS v3.0 Details

CVSS v3.0 Vector

CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:H

Attack Vector

Local

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

Low

Availability

High

References

USN-3872-1
vendor-advisory
x_refsource_UBUNTU
USN-3878-1
vendor-advisory
x_refsource_UBUNTU
USN-3871-5
vendor-advisory
x_refsource_UBUNTU
USN-3878-2
vendor-advisory
x_refsource_UBUNTU
USN-3871-4
vendor-advisory
x_refsource_UBUNTU
106254
vdb-entry
x_refsource_BID
USN-3871-1
vendor-advisory
x_refsource_UBUNTU
USN-3871-3
vendor-advisory
x_refsource_UBUNTU

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