VDB
CVE-2016-4020
CVE-2016-4020
PUBLISHED
CVSS 6.5 MEDIUM
The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR).
EPSS 0.37% · 30.0th percentile
Risk Scores
CVSS 3.1
6.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
EPSS Score
0.37%
30.0th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:14.04:LTS | qemu | *, 2.0.0+dfsg-2ubuntu1.7, 2.0.0+dfsg-2ubuntu1.8 |
| Ubuntu:16.04:LTS | qemu | 1:2.3+dfsg-5ubuntu10, 1:2.4+dfsg-4ubuntu1, 1:2.4+dfsg-4ubuntu2 |
Timeline
- Apr 14, 2016 CVE Published
- Feb 4, 2022 EPSS Score
- Mar 29, 2022 EPSS Score
- May 20, 2022 EPSS Score
- Jul 12, 2022 EPSS Score
- Sep 4, 2022 EPSS Score
- Oct 26, 2022 EPSS Score
- Dec 18, 2022 EPSS Score
- Feb 9, 2023 EPSS Score
- Mar 7, 2023 EPSS Score
- Apr 2, 2023 EPSS Score
- May 25, 2023 EPSS Score
References
- https://ubuntu.com/security/CVE-2016-4020 third-party-advisory
- https://lists.gnu.org/archive/html/qemu-devel/2016-04/msg01118.html third-party-advisory
- http://www.openwall.com/lists/oss-security/2016/04/13/6 third-party-advisory
- https://ubuntu.com/security/notices/USN-2974-1 vendor-advisory
- https://www.cve.org/CVERecord?id=CVE-2016-4020 third-party-advisory