CVE-2018-20124: canonical ubuntu_linux Out-of-bounds Read
CVSS: 5.5v3.1MediumModified
AliasesDEBIAN-CVE-2018-20124
Published 20-12-2018Last modified 05-08-2024
Vulnerability summary
CVE-2018-20124 is a medium (CVSS 5.5) Out-of-bounds Read vulnerability in canonical ubuntu_linux. EPSS estimates a 0.49% chance of exploitation in the next 30 days, higher than 41% of scored vulnerabilities.
CVSS score
5.5/10
010
Medium · v3.1 (NVD)EPSS score
0.49%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 20-12-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
hw/rdma/rdma_backend.c in QEMU allows guest OS users to trigger out-of-bounds access via a PvrdmaSqWqe ring element with a large num_sge value.
CVSS metrics
3 scores · 2 sources · 2 versionsMedium 5.5Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HSourcesAll 2 agree
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Low 2.1Preferred score · NVD (NIST)
AV:L/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
0.49%
Chance of exploitation in the next 30 days
Percentile
41%
Versus all other CVEs
30-day change
0.00 pp
From 0.49% on 21-09-2026
21-09-202621-10-2026
EPSS score0.49%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04 | 18.10
Debian1 product
- qemu< 1:4.1-1
Qemu1 product
- qemu≤ 3.1.0
3 vendors · 3 products
References
5 links- lists.gnu.org/archive/html/qemu-devel/2018-12/msg02822.htmlMailing ListX Refsource MLISTPatchThird Party Advisory
- www.openwall.com/lists/oss-security/2018/12/18/2Mailing ListX Refsource MLISTPatchThird Party Advisory
