CVE-2016-4453: canonical ubuntu_linux Loop with Unreachable Exit Condition
Vulnerability summary
CVE-2016-4453 is a medium (CVSS 4.9) Loop with Unreachable Exit Condition vulnerability in canonical ubuntu_linux. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 36.2% of scored vulnerabilities.
Not severe (CVSS 4.4, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 10 · Related 9Timeline
- 01-06-2016PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
The vmsvga_fifo_run function in hw/display/vmware_vga.c in QEMU allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via a VGA command.
CVSS metrics
5 scores · 3 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated4.4MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated4.4MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.42%
Chance of exploitation in the next 30 days
Percentile
36%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.42% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, administrative account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- qemu< 1:2.6+dfsg-3
- debian_linuxEOL8.0
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 16.04
Qemu1 product
- qemu≤ 2.6.0
Ubuntu1 product
- qemu< 2.0.0+dfsg-2ubuntu1.26 | < 1:2.5+dfsg-5ubuntu10.3
4 vendors · 5 products
References
12 links- lists.gnu.org/archive/html/qemu-devel/2016-05/msg05270.htmlMailing ListX Refsource MLISTPatchThird Party AdvisoryREPORT
- www.openwall.com/lists/oss-security/2016/05/30/2Mailing ListX Refsource MLISTPatchThird Party Advisory
lists.debian.org/debian-lts-announce/2018/11/msg00038.htmlMailing ListX Refsource MLISTThird Party Advisory