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6.0
MEDIUM CVSS 3.1
CVE-2016-7422
QEMU Virtio Virtqueue Denial of Service
Description

The virtqueue_map_desc function in hw/virtio/virtio.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) via a large I/O descriptor buffer length value.

INFO

Published Date :

Dec. 10, 2016, 12:59 a.m.

Last Modified :

April 12, 2025, 10:46 a.m.

Remotely Exploit :

No

Source :

[email protected]
Affected Products

The following products are affected by CVE-2016-7422 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Redhat enterprise_linux
2 Redhat openstack
3 Redhat virtualization
1 Opensuse leap
1 Qemu qemu
: Total Affected Vendor : 3 | Products : 5
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 LOW [email protected]
CVSS 3.1 MEDIUM [email protected]
Solution
This vulnerability allows a local guest OS administrator to cause a denial of service by updating the QEMU packages.
  • Update the QEMU packages.
  • If using SUSE, use YaST online_update or the zypper command to install the patch.
  • If using Gentoo, use emerge to update the package.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2016-7422.

URL Resource
http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=973e7170dddefb491a48df5cba33b2ae151013a0
http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/09/16/10 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/09/16/4 Mailing List Third Party Advisory
http://www.securityfocus.com/bid/92996 Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2017:2392 Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:2408 Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03546.html Patch Third Party Advisory
https://security.gentoo.org/glsa/201609-01 Third Party Advisory
http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=973e7170dddefb491a48df5cba33b2ae151013a0
http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/09/16/10 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/09/16/4 Mailing List Third Party Advisory
http://www.securityfocus.com/bid/92996 Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2017:2392 Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:2408 Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03546.html Patch Third Party Advisory
https://security.gentoo.org/glsa/201609-01 Third Party Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2016-7422 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2016-7422 weaknesses.

CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-67: String Format Overflow in syslog() String Format Overflow in syslog() CAPEC-92: Forced Integer Overflow Forced Integer Overflow CAPEC-100: Overflow Buffers Overflow Buffers

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2016-7422 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2016-7422 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=973e7170dddefb491a48df5cba33b2ae151013a0
    Added Reference http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html
    Added Reference http://www.openwall.com/lists/oss-security/2016/09/16/10
    Added Reference http://www.openwall.com/lists/oss-security/2016/09/16/4
    Added Reference http://www.securityfocus.com/bid/92996
    Added Reference https://access.redhat.com/errata/RHSA-2017:2392
    Added Reference https://access.redhat.com/errata/RHSA-2017:2408
    Added Reference https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03546.html
    Added Reference https://security.gentoo.org/glsa/201609-01
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Feb. 12, 2023

    Action Type Old Value New Value
    Changed Description CVE-2016-7422 Qemu: virtio: null pointer dereference in virtqueu_map_desc The virtqueue_map_desc function in hw/virtio/virtio.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) via a large I/O descriptor buffer length value.
    Removed CVSS V2 Red Hat, Inc. (AV:A/AC:M/Au:S/C:N/I:N/A:P)
    Removed CVSS V3 Red Hat, Inc. AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
    Removed Reference https://access.redhat.com/security/cve/CVE-2016-7422 [No Types Assigned]
    Removed Reference https://bugzilla.redhat.com/show_bug.cgi?id=1376755 [No Types Assigned]
  • CVE Modified by [email protected]

    Feb. 02, 2023

    Action Type Old Value New Value
    Changed Description The virtqueue_map_desc function in hw/virtio/virtio.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) via a large I/O descriptor buffer length value. CVE-2016-7422 Qemu: virtio: null pointer dereference in virtqueu_map_desc
    Added CVSS V2 Red Hat, Inc. (AV:A/AC:M/Au:S/C:N/I:N/A:P)
    Added CVSS V3 Red Hat, Inc. AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
    Removed Reference http://git.qemu.org/?p=qemu.git;a=commit;h=973e7170dddefb491a48df5cba33b2ae151013a0 [Patch, Vendor Advisory]
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=1376755 [No Types Assigned]
    Added Reference https://access.redhat.com/security/cve/CVE-2016-7422 [No Types Assigned]
    Added Reference http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=973e7170dddefb491a48df5cba33b2ae151013a0 [No Types Assigned]
  • CPE Deprecation Remap by [email protected]

    Aug. 04, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:redhat:openstack:9.0:*:*:*:*:*:*:* OR *cpe:2.3:a:redhat:openstack:9:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 04, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:redhat:openstack:11.0:*:*:*:*:*:*:* OR *cpe:2.3:a:redhat:openstack:11:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 04, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:redhat:openstack:8.0:*:*:*:*:*:*:* OR *cpe:2.3:a:redhat:openstack:8:*:*:*:*:*:*:*
  • Modified Analysis by [email protected]

    Oct. 15, 2020

    Action Type Old Value New Value
    Removed CVSS V3 NIST AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
    Added CVSS V3.1 NIST AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
    Changed Reference Type http://git.qemu.org/?p=qemu.git;a=commit;h=973e7170dddefb491a48df5cba33b2ae151013a0 Issue Tracking, Patch http://git.qemu.org/?p=qemu.git;a=commit;h=973e7170dddefb491a48df5cba33b2ae151013a0 Patch, Vendor Advisory
    Changed Reference Type http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html No Types Assigned http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html Mailing List, Third Party Advisory
    Changed Reference Type https://access.redhat.com/errata/RHSA-2017:2392 No Types Assigned https://access.redhat.com/errata/RHSA-2017:2392 Third Party Advisory
    Changed Reference Type https://access.redhat.com/errata/RHSA-2017:2408 No Types Assigned https://access.redhat.com/errata/RHSA-2017:2408 Third Party Advisory
    Changed Reference Type https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03546.html Patch, Vendor Advisory https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03546.html Patch, Third Party Advisory
    Changed Reference Type https://security.gentoo.org/glsa/201609-01 No Types Assigned https://security.gentoo.org/glsa/201609-01 Third Party Advisory
    Removed CWE NIST CWE-476
    Added CWE NIST CWE-120
    Changed CPE Configuration OR *cpe:2.3:a:qemu:qemu:-:*:*:*:*:*:*:* OR *cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* versions up to (including) 2.7.1
    Added CPE Configuration OR *cpe:2.3:o:opensuse:leap:42.2:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:redhat:openstack:6.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openstack:7.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openstack:8.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openstack:9.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openstack:11.0:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:* OR cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Jan. 05, 2018

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2017:2408 [No Types Assigned]
    Added Reference https://access.redhat.com/errata/RHSA-2017:2392 [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 01, 2017

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/201609-01 [No Types Assigned]
  • CVE Modified by [email protected]

    Jan. 07, 2017

    Action Type Old Value New Value
    Added Reference http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html [No Types Assigned]
  • Initial Analysis by [email protected]

    Dec. 12, 2016

    Action Type Old Value New Value
    Added CPE Configuration Configuration 1 OR *cpe:2.3:a:qemu:qemu:-:*:*:*:*:*:*:*
    Added CVSS V2 (AV:L/AC:L/Au:N/C:N/I:N/A:P)
    Added CVSS V3 AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
    Changed Reference Type https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03546.html No Types Assigned https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03546.html Vendor Advisory, Patch
    Changed Reference Type http://www.openwall.com/lists/oss-security/2016/09/16/4 No Types Assigned http://www.openwall.com/lists/oss-security/2016/09/16/4 Third Party Advisory, Mailing List
    Changed Reference Type http://git.qemu.org/?p=qemu.git;a=commit;h=973e7170dddefb491a48df5cba33b2ae151013a0 No Types Assigned http://git.qemu.org/?p=qemu.git;a=commit;h=973e7170dddefb491a48df5cba33b2ae151013a0 Issue Tracking, Patch
    Changed Reference Type http://www.securityfocus.com/bid/92996 No Types Assigned http://www.securityfocus.com/bid/92996 Third Party Advisory, VDB Entry
    Changed Reference Type http://www.openwall.com/lists/oss-security/2016/09/16/10 No Types Assigned http://www.openwall.com/lists/oss-security/2016/09/16/10 Third Party Advisory, Mailing List
    Added CWE CWE-476
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 6
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 2.1
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.09 }} -0.08%

score

0.23741

percentile