CVE-2018-6551

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

The malloc implementation in the GNU C Library (aka glibc or libc6), from version 2.24 to 2.26 on powerpc, and only in version 2.26 on i386, did not properly handle malloc calls with arguments close to SIZE_MAX and could return a pointer to a heap region that is smaller than requested, eventually leading to heap corruption.

Metrics

CVSS 3.0 9.8/10CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-190CWE-787

Affected software

No affected versions have been published.

Timeline

Published
Feb 2, 2018
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2018

CVE-2018-65527.8Apport does not properly handle crashes originating from a PID namespace allowing local users to create certain files as root which an attacCVE-2018-65538.8The CUPS AppArmor profile incorrectly confined the dnssd backend due to use of hard links. A local attacker could possibly use this issue toCVE-2018-65545.5Memory leak in the irda_bind function in net/irda/af_irda.c and later in drivers/staging/irda/net/af_irda.c in the Linux kernel before 4.17 CVE-2018-65557.8The irda_setsockopt function in net/irda/af_irda.c and later in drivers/staging/irda/net/af_irda.c in the Linux kernel before 4.17 allows loCVE-2018-65563.3lxc-user-nic when asked to delete a network interface will unconditionally open a user provided path. This code path may be used by an unpriCVE-2018-65577.0The MOTD update script in the base-files package in Ubuntu 18.04 LTS before 10.1ubuntu2.2, and Ubuntu 18.10 before 10.1ubuntu6 incorrectly hCVE-2018-65586.5The pam_fscrypt module in fscrypt before 0.2.4 may incorrectly restore primary and supplementary group IDs to the values associated with theCVE-2018-65593.3The Linux kernel, as used in Ubuntu 18.04 LTS and Ubuntu 18.10, allows local users to obtain names of files in which they would not normallyCVE-2018-65608.8In dbus-proxy/flatpak-proxy.c in Flatpak before 0.8.9, and 0.9.x and 0.10.x before 0.10.3, crafted D-Bus messages to the host can be used toCVE-2018-65616.1dijit.Editor in Dojo Toolkit 1.13 allows XSS via the onload attribute of an SVG element.CVE-2018-65627.5totemomail Encryption Gateway before 6.0_b567 allows remote attackers to obtain sensitive information about user sessions and encryption keyCVE-2018-65638.8Multiple cross-site request forgery (CSRF) vulnerabilities in totemomail Encryption Gateway before 6.0.0_Build_371 allow remote attackers to
CVE-2018-6551: Critical severity, CVSS 9.8 | Vulnix