CVE-2016-9915

Ubuntu Security Notice USN-3261-1

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Memory leak in hw/9pfs/9p-handle.c in QEMU (aka Quick Emulator) allows local privileged guest OS users to cause a denial of service (host memory consumption and possibly QEMU process crash) by leveraging a missing cleanup operation in the handle backend.

Fuga de memoria en hw/9pfs/9p-handle.c en QEMU (también conocido como Quick Emulator) permite a usuarios privilegiados locales del SO huésped provocar una denegación de servicio (consumo de memoria del host y posiblemente caída del proceso QEMU) aprovechando una operación de limpieza perdida en la backend manejada.

Zhenhao Hong discovered that QEMU incorrectly handled the Virtio GPU device. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS and Ubuntu 16.10. Li Qiang discovered that QEMU incorrectly handled the 6300esb watchdog. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. Various other issues were also addressed.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-12-08 CVE Reserved
2016-12-29 CVE Published
2024-08-06 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-401: Missing Release of Memory after Effective Lifetime

CAPEC

References (7)

URL	Tag	Source
http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=971f406b77a6eb84e0ad27dcc416b663765aee30	X_refsource_confirm
http://www.openwall.com/lists/oss-security/2016/12/06/11	Mailing List
http://www.openwall.com/lists/oss-security/2016/12/08/7	Mailing List
http://www.securityfocus.com/bid/94729	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html	Mailing List

URL	Date	SRC

URL	Date	SRC
https://lists.gnu.org/archive/html/qemu-devel/2016-11/msg03278.html	2023-02-12

URL	Date	SRC
https://security.gentoo.org/glsa/201701-49	2023-02-12

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Qemu Search vendor "Qemu"		Qemu Search vendor "Qemu" for product "Qemu"				<= 2.7.1 Search vendor "Qemu" for product "Qemu" and version " <= 2.7.1"		-		Affected
Qemu Search vendor "Qemu"		Qemu Search vendor "Qemu" for product "Qemu"				2.8.0 Search vendor "Qemu" for product "Qemu" and version "2.8.0"		rc0		Affected
Qemu Search vendor "Qemu"		Qemu Search vendor "Qemu" for product "Qemu"				2.8.0 Search vendor "Qemu" for product "Qemu" and version "2.8.0"		rc1		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected