VDB
CVE-2018-16882
CVE-2018-16882
PUBLISHED
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.
EPSS 0.10% · 27.5th percentile
Risk Scores
EPSS Score
0.10%
27.5th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:16.04:LTS | linux-hwe | 0, *, * |
| Ubuntu:18.04:LTS | linux | 4.15.0-38.41, 4.15.0-22.24, 4.15.0-23.25 |
| Ubuntu:18.04:LTS | linux-gcp | 4.15.0-1015.15, 4.15.0-1014.14, 4.15.0-1005.5 |
| Ubuntu:16.04:LTS | linux-azure | 4.13.0-1018.21, 4.11.0-1009.9, 4.11.0-1014.14 |
| Ubuntu:18.04:LTS | linux-gcp-edge | 0, 4.18.0-1004.5~18.04.1, * |
| Ubuntu:18.04:LTS | linux-oem | 4.15.0-1008.11, 4.15.0-1009.12, 4.15.0-1012.15 |
| Ubuntu:18.04:LTS | linux-hwe | 0, 4.18.0-13.14~18.04.1 |
| Ubuntu:18.04:LTS | linux-oracle | 0, 4.15.0-1007.9 |
| Ubuntu:14.04:LTS | linux-azure | 4.15.0-1031.32~14.04.1, *, 4.15.0-1023.24~14.04.1 |
| Ubuntu:18.04:LTS | linux-raspi2 | 4.15.0-1028.30, 4.15.0-1027.29, 4.15.0-1026.28 |
| Ubuntu:16.04:LTS | linux-oracle | 4.15.0-1007.9~16.04.1, 0 |
| Ubuntu:18.04:LTS | linux-kvm | 4.15.0-1002.2, 4.15.0-1003.3, 4.15.0-1004.4 |
| Ubuntu:16.04:LTS | linux-gcp | *, 0, 4.13.0-1008.11 |
| Ubuntu:16.04:LTS | linux-aws-hwe | 4.15.0-1031.33~16.04.1, 0, 4.15.0-1030.31~16.04.1 |
| Ubuntu:18.04:LTS | linux-aws | 4.15.0-1019.19, 4.15.0-1020.20, 4.15.0-1021.21 |
| Ubuntu:18.04:LTS | linux-azure | 4.15.0-1022.23, 0, 4.15.0-1002.2 |
Timeline
- Jan 3, 2019 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Dec 27, 2021 EPSS Score
- Feb 4, 2022 EPSS Score
- Feb 28, 2022 EPSS Score
- May 2, 2022 EPSS Score
- Sep 5, 2022 EPSS Score
- Nov 6, 2022 EPSS Score
- Jan 8, 2023 EPSS Score
References
- https://ubuntu.com/security/CVE-2018-16882 third-party-advisory
- https://www.openwall.com/lists/oss-security/2018/12/18/6 third-party-advisory
- https://marc.info/?l=kvm&m=154514994222809&w=2 third-party-advisory
- https://ubuntu.com/security/notices/USN-3871-1 vendor-advisory
- https://ubuntu.com/security/notices/USN-3872-1 vendor-advisory
- https://ubuntu.com/security/notices/USN-3871-3 vendor-advisory
- https://ubuntu.com/security/notices/USN-3871-4 vendor-advisory
- https://ubuntu.com/security/notices/USN-3878-1 vendor-advisory
- https://ubuntu.com/security/notices/USN-3871-5 vendor-advisory
- https://ubuntu.com/security/notices/USN-3878-2 vendor-advisory
- https://www.cve.org/CVERecord?id=CVE-2018-16882 third-party-advisory