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CVE-2016-9921 (GCVE-0-2016-9921)

Vulnerability from cvelistv5 – Published: 2016-12-23 22:00 – Updated: 2024-08-06 03:07
VLAI
Summary
Quick emulator (Qemu) built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to a divide by zero issue. It could occur while copying VGA data when cirrus graphics mode was set to be VGA. A privileged user inside guest could use this flaw to crash the Qemu process instance on the host, resulting in DoS.
Severity
6.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
CWE
  • n/a
Assigner
References
URL Tags
https://lists.debian.org/debian-lts-announce/2018… mailing-listx_refsource_MLIST
https://access.redhat.com/errata/RHSA-2017:2392 vendor-advisoryx_refsource_REDHAT
https://security.gentoo.org/glsa/201701-49 vendor-advisoryx_refsource_GENTOO
http://www.securityfocus.com/bid/94803 vdb-entryx_refsource_BID
https://access.redhat.com/errata/RHSA-2017:2408 vendor-advisoryx_refsource_REDHAT
http://www.openwall.com/lists/oss-security/2016/12/09/1 mailing-listx_refsource_MLIST
Date Public
2016-12-09 00:00
Show details on NVD website
To clipboard 

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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-28T11:43:14+00:00",
      "cve": "CVE-2016-9921",
      "id": "CVE-2016-9921",
      "initial_release_date": "2016-10-18T00:00:00+00:00",
      "product_status:fixed": "47",
      "product_status:known_affected": "19",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Qemu: display: cirrus_vga: a divide by zero in cirrus_do_copy",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2016/cve-2016-9921.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-01T02:07:36Z",
      "cve": "CVE-2016-9921",
      "id": "CVE-2016-9921",
      "initial_release_date": "2023-02-15T04:54:44Z",
      "product_status:known_affected": "321",
      "product_status:known_not_affected": "237",
      "product_status:recommended": "2364",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2016-9921",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2016-9921.json",
      "version": "38"
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  }
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.