CVE-2020-14364: canonical ubuntu_linux Out-of-bounds Read
Vulnerability summary
CVE-2020-14364 is a medium (CVSS 5.0) Out-of-bounds Read vulnerability in canonical ubuntu_linux. EPSS estimates a 5.40% chance of exploitation in the next 30 days, higher than 92.6% of scored vulnerabilities.
Not severe (CVSS 5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 35 · Related 27Timeline
- 31-08-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
An out-of-bounds read/write access flaw was found in the USB emulator of the QEMU in versions before 5.2.0. This issue occurs while processing USB packets from a guest when USBDevice 'setup_len' exceeds its 'data_buf[4096]' in the do_token_in, do_token_out routines. This flaw allows a guest user to crash the QEMU process, resulting in a denial of service, or the potential execution of arbitrary code with the privileges of the QEMU process on the host.
CVSS metrics
6 scores · 5 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated5.0MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L
- OSV · Red hatEcosystem advisory · calculated5.0MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L
- OSV · UbuntuEcosystem advisory · calculated5.0MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L
- OSV · DebianEcosystem advisory · calculated5.0MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L
EPSS trend
Probability
5.40%
Chance of exploitation in the next 30 days
Percentile
93%
Versus all other CVEs
30-day change
Decrease -0.04 pp
From 5.45% on 04-10-2026
Known exploited
Compare KEV catalogsNot in the CISA KEV catalog.
Not in the ENISA CNW catalog.
Not 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.
Redhat191 products
- enterprise_linuxEOL6.0 | 7.0 | 8.0
- openstack10 | 13
- hivex< 0:1.3.15-7.module+el8.1.0+4066+0f1aadab | < 0:1.3.15-7.module+el8.0.0+4084+cceb9f44 | < 0:1.3.18-20.module+el8.2.0+5588+63a201c3
- hivex-debuginfo< 0:1.3.15-7.module+el8.1.0+4066+0f1aadab | < 0:1.3.15-7.module+el8.0.0+4084+cceb9f44 | < 0:1.3.18-20.module+el8.2.0+5588+63a201c3
- hivex-debugsource< 0:1.3.15-7.module+el8.1.0+4066+0f1aadab | < 0:1.3.15-7.module+el8.0.0+4084+cceb9f44 | < 0:1.3.18-20.module+el8.2.0+5588+63a201c3
Alpine2 products
- qemu< 5.0.0-r2 | < 5.1.0-r1
- xen< 4.12.3-r3 | < 4.13.1-r3 | < 4.13.1-r5 | < 4.11.4-r1
Debian2 products
- qemu< 1:5.1+dfsg-4
- debian_linuxEOL9.0 | 10.0
Canonical1 product
- ubuntu_linuxEOL16.04 | 18.04 | 20.04
Fedoraproject1 product
- fedoraEOL31 | 32
Opensuse1 product
- leapEOL15.2
Qemu1 product
- qemu< 5.2.0
Ubuntu1 product
- qemu< 2.0.0+dfsg-2ubuntu1.47+esm1 | < 1:2.5+dfsg-5ubuntu10.46 | < 1:2.11+dfsg-1ubuntu7.32 | < 1:4.2-3ubuntu6.6
8 vendors · 200 products · Showing 200 of 253
References
55 links- bugzilla.redhat.com/show_bug.cgi?id=1869201X Refsource MISCREPORTIssue TrackingPatchThird Party Advisory
- www.openwall.com/lists/oss-security/2020/08/24/3X Refsource MISCARTICLEREPORTMailing ListThird Party Advisory
- www.openwall.com/lists/oss-security/2020/08/24/2X Refsource MISCARTICLEREPORTMailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2020/09/msg00013.htmlMailing ListX Refsource MLISTThird Party Advisory
Show all 55 references
- lists.opensuse.org/opensuse-security-announce/2020-10/msg00024.htmlVendor AdvisoryX Refsource SUSEBroken LinkMailing ListThird Party Advisory