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.

• CWE-416
• CWE-416

• http://www.securityfocus.com/bid/106254Third Party Advisory, VDB Entry
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16882Issue Tracking, Patch, Third Party Advisory
• https://lwn.net/Articles/775720/Third Party Advisory
• https://lwn.net/Articles/775721/Third Party Advisory
• https://marc.info/?l=kvm&m=154514994222809&w=2Patch, Third Party Advisory
• https://support.f5.com/csp/article/K80557033Third Party Advisory
• https://usn.ubuntu.com/3871-1/Third Party Advisory
• https://usn.ubuntu.com/3871-3/Third Party Advisory
• https://usn.ubuntu.com/3871-4/Third Party Advisory
• https://usn.ubuntu.com/3871-5/Third Party Advisory
• https://usn.ubuntu.com/3872-1/Third Party Advisory
• https://usn.ubuntu.com/3878-1/Third Party Advisory
• https://usn.ubuntu.com/3878-2/Third Party Advisory
• http://www.securityfocus.com/bid/106254Third Party Advisory, VDB Entry
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16882Issue Tracking, Patch, Third Party Advisory
• https://lwn.net/Articles/775720/Third Party Advisory
• https://lwn.net/Articles/775721/Third Party Advisory
• https://marc.info/?l=kvm&m=154514994222809&w=2Patch, Third Party Advisory
• https://support.f5.com/csp/article/K80557033Third Party Advisory
• https://usn.ubuntu.com/3871-1/Third Party Advisory
• https://usn.ubuntu.com/3871-3/Third Party Advisory
• https://usn.ubuntu.com/3871-4/Third Party Advisory
• https://usn.ubuntu.com/3871-5/Third Party Advisory
• https://usn.ubuntu.com/3872-1/Third Party Advisory
• https://usn.ubuntu.com/3878-1/Third Party Advisory
• https://usn.ubuntu.com/3878-2/Third Party Advisory

Published

Jan 3, 2019

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2018-16877A flaw was found in the way pacemaker's client-server authen…7.8
• CVE-2018-16878A flaw was found in pacemaker up to and including version 2.…5.5
• CVE-2018-16879Ansible Tower before version 3.3.3 does not set a secure cha…9.8
• CVE-2018-1688IBM Jazz Foundation (IBM Rational Collaborative Lifecycle Ma…5.4
• CVE-2018-16880A flaw was found in the Linux kernel's handle_rx() function …7
• CVE-2018-16881A denial of service vulnerability was found in rsyslog in th…7.5
• CVE-2018-16883sssd versions from 1.13.0 to before 2.0.0 did not properly r…2.5
• CVE-2018-16884A flaw was found in the Linux kernel's NFS41+ subsystem. NFS…8
• CVE-2018-16885A flaw was found in the Linux kernel that allows the userspa…4.7
• CVE-2018-16886etcd versions 3.2.x before 3.2.26 and 3.3.x before 3.3.11 ar…8.1
• CVE-2018-16887A cross-site scripting (XSS) flaw was found in the katello c…5.4
• CVE-2018-16888It was discovered systemd does not correctly check the conte…4.7