Use After Free Affecting kernel-kdump package, versions <0:2.6.32-696.el6


Severity

Recommended
medium

Based on CentOS security rating.

Threat Intelligence

EPSS
0.04% (12th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications

Snyk Learn

Learn about Use After Free vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-CENTOS6-KERNELKDUMP-2138784
  • published26 Jul 2021
  • disclosed25 Nov 2016

Introduced: 25 Nov 2016

CVE-2016-9576  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Centos:6 kernel-kdump to version 0:2.6.32-696.el6 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-kdump package and not the kernel-kdump package as distributed by Centos. See How to fix? for Centos:6 relevant fixed versions and status.

The blk_rq_map_user_iov function in block/blk-map.c in the Linux kernel before 4.8.14 does not properly restrict the type of iterator, which allows local users to read or write to arbitrary kernel memory locations or cause a denial of service (use-after-free) by leveraging access to a /dev/sg device.

CVSS Scores

version 3.1