CVE-2018-16882

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.

CVSS v3.0 8.8 HIGH
CVSS v2.0 7.2 HIGH

8.8^/10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 2.0 / Impact : 6.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

7.2^/10

CVSS v2.0 : HIGH

V2 Legend

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

Exploitability : 3.9 / Impact : 10.0

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://marc.info/?l=kvm&m=154514994222809&w=2	Patch Third Party Advisory
https://lwn.net/Articles/775721/	Third Party Advisory
https://lwn.net/Articles/775720/	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16882	Issue Tracking Patch Third Party Advisory
http://www.securityfocus.com/bid/106254	Third Party Advisory VDB Entry
https://usn.ubuntu.com/3872-1/	Third Party Advisory
https://usn.ubuntu.com/3871-1/	Third Party Advisory
https://usn.ubuntu.com/3878-1/	Third Party Advisory
https://usn.ubuntu.com/3871-4/	Third Party Advisory
https://usn.ubuntu.com/3871-3/	Third Party Advisory
https://usn.ubuntu.com/3878-2/	Third Party Advisory
https://usn.ubuntu.com/3871-5/	Third Party Advisory
https://support.f5.com/csp/article/K80557033	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

Configuration 2 (hide)

OR	cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:18.10:::::::*

Information

Published : 2019-01-03 08:29

Updated : 2023-01-19 08:04

NVD link : CVE-2018-16882

Mitre link : CVE-2018-16882

JSON object : View

CWE

CWE-416

Use After Free

Products Affected

canonical

ubuntu_linux

linux

linux_kernel

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8.8 /10