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


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (12th percentile)

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  • Snyk IDSNYK-RHEL6-KERNELDEBUGDEVEL-1511577
  • 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 RHEL:6 kernel-debug-devel to version 0:2.6.32-696.el6 or higher.
This issue was patched in RHSA-2017:0817.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-debug-devel package and not the kernel-debug-devel package as distributed by RHEL. See How to fix? for RHEL: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