What’s Vulnerable › Vulnerabilities

CVE-2018-14600

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 9.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-08-24 · updated 2026-06-17
• Weakness: CWE-787

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.

Affected products

• Canonical Ubuntu Linux: 12.04, 14.04, 16.04, 18.04
• Debian Linux: 8.0
• x.org libX11: through 1.6.5

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

Get alerted when CVE-2018-14600 or the next vulnerability affects your stack