Vulnerability Details : CVE-2016-9846
QEMU (aka Quick Emulator) built with the Virtio GPU Device emulator support is vulnerable to a memory leakage issue. It could occur while updating the cursor data in update_cursor_data_virgl. A guest user/process could use this flaw to leak host memory bytes, resulting in DoS for a host.
Vulnerability category: Denial of service
Products affected by CVE-2016-9846
- cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
- cpe:2.3:a:qemu:qemu:2.8.0:rc0:*:*:*:*:*:*
- cpe:2.3:a:qemu:qemu:2.8.0:rc1:*:*:*:*:*:*
- cpe:2.3:a:qemu:qemu:2.8.0:rc2:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2016-9846
0.09%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 22 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2016-9846
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.9
|
MEDIUM | AV:L/AC:L/Au:N/C:N/I:N/A:C |
3.9
|
6.9
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
2.0
|
4.0
|
NIST |
CWE ids for CVE-2016-9846
-
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.Assigned by: nvd@nist.gov (Primary)
References for CVE-2016-9846
-
http://www.securityfocus.com/bid/94765
QEMU '/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c' Denial of Service VulnerabilityThird Party Advisory;VDB Entry
-
https://lists.gnu.org/archive/html/qemu-devel/2016-11/msg00029.html
[Qemu-devel] [PATCH] virtio-gpu: fix memory leak in update_cursor_data_vPatch;Vendor Advisory
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https://security.gentoo.org/glsa/201701-49
QEMU: Multiple vulnerabilities (GLSA 201701-49) — Gentoo securityThird Party Advisory
-
http://www.openwall.com/lists/oss-security/2016/12/05/18
oss-security - CVE request Qemu: display: virtio-gpu: memory leakage while updating cursorMailing List;Third Party Advisory
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http://www.openwall.com/lists/oss-security/2016/12/05/23
oss-security - Re: CVE request Qemu: display: virtio-gpu: memory leakage while updating cursorMailing List;Third Party Advisory
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