CVE-2018-14600
9.8
CRITICAL · CVSS 3.0 · EPSS 9.3% (pctl 95)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 9.34% — more likely to be exploited than 95% of all CVEs |
| Weakness | CWE-787 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2018-08-24 |
| Last modified | 2026-06-17 |
Affected (3)
| Vendor | Product |
|---|---|
| canonical | ubuntu linux |
| debian | debian linux |
| x.org | libx11 |
References
- http://www.openwall.com/lists/oss-security/2018/08/21/6
- http://www.securityfocus.com/bid/105177
- http://www.securitytracker.com/id/1041543
- https://access.redhat.com/errata/RHSA-2019:2079
- https://bugzilla.suse.com/show_bug.cgi?id=1102068
- https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=dbf72805fd9d7b1846fe9a11b46f3994bfc27fea
- https://lists.debian.org/debian-lts-announce/2018/08/msg00030.html
- https://lists.x.org/archives/xorg-announce/2018-August/002916.html
- https://security.gentoo.org/glsa/201811-01
- https://usn.ubuntu.com/3758-1/
- https://usn.ubuntu.com/3758-2/
- http://www.openwall.com/lists/oss-security/2018/08/21/6
- http://www.securityfocus.com/bid/105177
- http://www.securitytracker.com/id/1041543
- https://access.redhat.com/errata/RHSA-2019:2079
- https://bugzilla.suse.com/show_bug.cgi?id=1102068
- https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=dbf72805fd9d7b1846fe9a11b46f3994bfc27fea
- https://lists.debian.org/debian-lts-announce/2018/08/msg00030.html
- https://lists.x.org/archives/xorg-announce/2018-August/002916.html
- https://security.gentoo.org/glsa/201811-01
→ the Explorer · watch your stack · NVD