Your submission was sent successfully! Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

CVE-2017-17426

Published: 5 December 2017

The malloc function in the GNU C Library (aka glibc or libc6) 2.26 could return a memory block that is too small if an attempt is made to allocate an object whose size is close to SIZE_MAX, potentially leading to a subsequent heap overflow. This occurs because the per-thread cache (aka tcache) feature enables a code path that lacks an integer overflow check.

Priority

Medium

Cvss 3 Severity Score

8.1

Score breakdown

Status

Package Release Status
eglibc
Launchpad, Ubuntu, Debian
upstream Not vulnerable

trusty Not vulnerable

xenial Does not exist

zesty Does not exist

artful Does not exist

bionic Does not exist

cosmic Does not exist

glibc
Launchpad, Ubuntu, Debian
upstream
Released (2.27)
trusty Does not exist

xenial Not vulnerable

zesty Not vulnerable

artful
Released (2.26-0ubuntu2.1)
bionic Not vulnerable
(2.27-3ubuntu1)
cosmic Not vulnerable
(2.27-3ubuntu1)
Patches:
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=34697694e8a93b325b18f25f7dcded55d6baeaf6

Severity score breakdown

Parameter Value
Base score 8.1
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H