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CVE-2016-7421

Date: December 9, 2016

The pvscsi_ring_pop_req_descr function in hw/scsi/vmw_pvscsi.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) by leveraging failure to limit process IO loop to the ring size.

Language: C

Severity Score

Related Resources (12)

https://security-tracker.debian.org/tracker/CVE-2016-7421
https://people.canonical.com/~ubuntu-security/cve/CVE-2016-7421
https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03609.html
https://nvd.nist.gov/vuln/detail/CVE-2016-7421
http://www.securityfocus.com/bid/92998
http://www.openwall.com/lists/oss-security/2016/09/16/3
https://access.redhat.com/security/cve/CVE-2016-7421
http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=d251157ac1928191af851d199a9ff255d330bec9
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
http://www.openwall.com/lists/oss-security/2016/09/16/9
https://security.gentoo.org/glsa/201609-01
https://www.mend.io/vulnerability-database/CVE-2016-7421

Severity Score

Weakness Type (CWE)

Resource Management Errors

CWE-399

Excessive Iteration

CWE-834

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): HIGH
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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