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CVE-2018-16882

CVSS v3.1 8.8 (High)
88% Progress
CVSS v2.0 7.2 (High)
72% Progress
EPSS 0.06 % (28th)
0.06% Progress
Affected Products 2
Advisories 10
Info CVSS EPSS Affected Configurations References Security Advisories Packages & Software OVAL Tools, Exploits & PoC Graph Web & Social Timeline

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.

Weaknesses
CWE-416
Use After Free
CVE Status
PUBLISHED
CNA
Red Hat, Inc.
Published Date
2019-01-03 16:29:00
(5 years ago)
Updated Date
2023-01-19 16:04:54
(20 months ago)

Affected Products

Canonical

Linux

Configuration #1

    CPE23 From Up To
  Linux Kernel from 4.14 version and prior 4.14.91 version cpe:2.3:o:linux:linux_kernel >= 4.14 < 4.14.91
  Linux Kernel from 4.15 version and prior 4.19.13 version cpe:2.3:o:linux:linux_kernel >= 4.15 < 4.19.13

Configuration #2

    CPE23 From Up To
  Canonical Ubuntu Linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts
  Canonical Ubuntu Linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts
  Canonical Ubuntu Linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts
  Canonical Ubuntu Linux 18.10 cpe:2.3:o:canonical:ubuntu_linux:18.10