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CVE-2018-16882 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CNA: [email protected]CVSS-B:6.1 MEDIUMVector:CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16882	CVE	Issue TrackingPatchThird Party Advisory
https://lwn.net/Articles/775720/	CVE	Third Party Advisory
https://lwn.net/Articles/775721/	CVE	Third Party Advisory
https://marc.info/?l=kvm&m=154514994222809&w=2	CVE	PatchThird Party Advisory
https://support.f5.com/csp/article/K80557033	CVE	Third Party Advisory
https://usn.ubuntu.com/3871-1/	CVE	Third Party Advisory
https://usn.ubuntu.com/3871-3/	CVE	Third Party Advisory
https://usn.ubuntu.com/3871-4/	CVE	Third Party Advisory
https://usn.ubuntu.com/3871-5/	CVE	Third Party Advisory
https://usn.ubuntu.com/3872-1/	CVE	Third Party Advisory
https://usn.ubuntu.com/3878-1/	CVE	Third Party Advisory
https://usn.ubuntu.com/3878-2/	CVE	Third Party Advisory
http://www.securityfocus.com/bid/106254	CVE	Third Party AdvisoryVDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16882	[email protected]	Issue TrackingPatchThird Party Advisory
https://lwn.net/Articles/775720/	[email protected]	Third Party Advisory
https://lwn.net/Articles/775721/	[email protected]	Third Party Advisory
https://marc.info/?l=kvm&m=154514994222809&w=2	[email protected]	PatchThird Party Advisory
https://support.f5.com/csp/article/K80557033	[email protected]	Third Party Advisory
https://usn.ubuntu.com/3871-1/	[email protected]	Third Party Advisory
https://usn.ubuntu.com/3871-3/	[email protected]	Third Party Advisory
https://usn.ubuntu.com/3871-4/	[email protected]	Third Party Advisory
https://usn.ubuntu.com/3871-5/	[email protected]	Third Party Advisory
https://usn.ubuntu.com/3872-1/	[email protected]	Third Party Advisory
https://usn.ubuntu.com/3878-1/	[email protected]	Third Party Advisory
https://usn.ubuntu.com/3878-2/	[email protected]	Third Party Advisory
http://www.securityfocus.com/bid/106254	[email protected]	Third Party AdvisoryVDB Entry

see all 26 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-416	Use After Free	[email protected]
CWE-416	Use After Free	[email protected]

Affected Products

Product	Versions
linux linux kernel	>= 4.14, < 4.14.91 >= 4.15, < 4.19.13
CPE cpe:2.3:o:linux:linux_kernel:::::::: Remediation No remediation found in references.
canonical ubuntu linux	14.04 16.04 18.04 18.10
CPE cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts::: cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts::: cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts::: cpe:2.3:o:canonical:ubuntu_linux:18.10:::::::* Remediation No remediation found in references.

Change History

13 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Jan 19, 2023	Modified Analysis	[email protected]
Oct 9, 2019	CVE Modified	[email protected]
Apr 23, 2019	Modified Analysis	[email protected]
Apr 22, 2019	CVE Modified	[email protected]
Mar 5, 2019	Modified Analysis	[email protected]
Feb 9, 2019	CVE Modified	[email protected]
Feb 5, 2019	CVE Modified	[email protected]
Jan 30, 2019	CVE Modified	[email protected]
Jan 29, 2019	Initial Analysis	[email protected]
Jan 4, 2019	CVE Modified	[email protected]