CVE-2018-5683: canonical ubuntu_linux Out-of-bounds Read
Vulnerability summary
CVE-2018-5683 is a medium (CVSS 6.0) Out-of-bounds Read vulnerability in canonical ubuntu_linux. EPSS estimates a 0.68% chance of exploitation in the next 30 days, higher than 52.5% of scored vulnerabilities. 1 public exploit is recorded.
Not severe (CVSS 6, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 17 · Related 11Timeline
- 23-01-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
The vga_draw_text function in Qemu allows local OS guest privileged users to cause a denial of service (out-of-bounds read and QEMU process crash) by leveraging improper memory address validation.
CVSS metrics
5 scores · 3 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated6.0MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.0MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
EPSS trend
Probability
0.68%
Chance of exploitation in the next 30 days
Percentile
53%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.68% 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
1 foundExploit Reference (lists.gnu.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, administrative account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat6 products
- enterprise_linux_desktop6.0 | 7.0
- enterprise_linux_server6.0 | 7.0
- enterprise_linux_server_aus7.6 | 7.7
- enterprise_linux_server_eus7.6 | 7.7
- enterprise_linux_server_tus7.6 | 7.7
Debian2 products
- qemu< 1:2.12~rc3+dfsg-1
- debian_linuxEOL8.0 | 9.0
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 17.10
Qemu1 product
- qemu≤ 2.11.1
Ubuntu1 product
- qemu< 2.0.0+dfsg-2ubuntu1.39 | < 1:2.5+dfsg-5ubuntu10.22 | < 1:2.11+dfsg-1ubuntu2
5 vendors · 11 products
References
14 links
lists.debian.org/debian-lts-announce/2018/09/msg00007.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.gnu.org/archive/html/qemu-devel/2018-01/msg02597.htmlMailing ListX Refsource MLISTExploitThird Party Advisory
- www.openwall.com/lists/oss-security/2018/01/15/2Mailing ListX Refsource MLISTPatchThird Party AdvisoryREPORT