CVE-2018-14600: canonical ubuntu_linux Out-of-bounds Write
CVSS: 9.8v3.0CriticalModified
AliasesALPINE-CVE-2018-14600UBUNTU-CVE-2018-14600DEBIAN-CVE-2018-14600
Published 24-08-2018Last modified 05-08-2024
Vulnerability summary
CVE-2018-14600 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in canonical ubuntu_linux. EPSS estimates a 9.34% chance of exploitation in the next 30 days, higher than 95.3% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.0 (NVD)EPSS score
9.34%
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 8 · Related 5Timeline
- 24-08-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c interprets a variable as signed instead of unsigned, resulting in an out-of-bounds write (of up to 128 bytes), leading to DoS or remote code execution.
CVSS metrics
5 scores · 4 sources · 2 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 4 agree
- OSV · AlpineEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
9.34%
Chance of exploitation in the next 30 days
Percentile
95%
Versus all other CVEs
30-day change
0.00 pp
From 9.34% on 18-09-2026
18-09-202618-10-2026
EPSS score9.34%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian2 products
- libx11< 2:1.6.6-1
- debian_linuxEOL8.0
Alpine1 product
- libx11< 1.6.6-r0
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 16.04 | 18.04
Ubuntu1 product
- libx11< 2:1.6.2-1ubuntu2.1 | < 2:1.6.3-1ubuntu2.1 | < 2:1.6.4-3ubuntu0.1
X.org1 product
- libx11≤ 1.6.5
5 vendors · 6 products
References
17 links- cgit.freedesktop.org/xorg/lib/libX11/commit/?id=dbf72805fd9d7b1846fe9a11b46f3994bfc27feaX Refsource CONFIRMPatchThird Party Advisory
lists.debian.org/debian-lts-announce/2018/08/msg00030.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.x.org/archives/xorg-announce/2018-August/002916.htmlMailing ListX Refsource MLISTThird Party Advisory