CVE-2018-14600
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
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 9.34% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 95.1% of scored records. A rank, not a probability.
- NVD base score
- 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2018-08-24 19:00Z8 YR AGO
- Last updated
- 2024-08-05 09:29Z2 YR AGO
- Reserved
- 2018-07-26
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-787Out-of-bounds WriteBase
- Data version
- 5.1
- Document digest
- 10fcc67a184af3d57cb1215404504aeddf95e279734b5e7ce56e1ba369148df1
05 Affected products
06 References
- usn.ubuntu.comUSN-3758-2https://usn.ubuntu.com/3758-2/
- security.gentoo.orgGLSA-201811-01https://security.gentoo.org/glsa/201811-01
- www.securityfocus.com105177http://www.securityfocus.com/bid/105177
- bugzilla.suse.comhttps://bugzilla.suse.com/show_bug.cgi?id=1102068
- www.openwall.com[oss-security] 20180821 X.Org security advisory: August 21, 2018http://www.openwall.com/lists/oss-security/2018/08/21/6
- www.securitytracker.com1041543http://www.securitytracker.com/id/1041543
- cgit.freedesktop.orghttps://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=dbf72805fd9d7b1846fe9a11b46f3994bfc27fea
- lists.debian.org[debian-lts-announce] 20180829 [SECURITY] [DLA 1482-1] libx11 security updatehttps://lists.debian.org/debian-lts-announce/2018/08/msg00030.html
- lists.x.org[xorg-announce] 20180821 libX11 1.6.6https://lists.x.org/archives/xorg-announce/2018-August/002916.html
- usn.ubuntu.comUSN-3758-1https://usn.ubuntu.com/3758-1/
- access.redhat.comRHSA-2019:2079https://access.redhat.com/errata/RHSA-2019:2079
07 Fixed in
Debian 12
- libx11 Fixed in 2:1.6.6-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- libx11 Fixed in 2:1.6.6-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- libx11 Fixed in 2:1.6.6-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- libx11 Fixed in 2:1.6.2-1ubuntu2.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- libx11 Fixed in 2:1.6.3-1ubuntu2.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- libx11 Fixed in 2:1.6.4-3ubuntu0.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.