SB2016122811 - Use-after-free in Linux kernel block
Published: December 28, 2016
Security Bulletin ID
SB2016122811
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2016-9576)
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to a use-after-free error within the blk_rq_map_user_iov() function in block/blk-map.c. A local user can execute arbitrary code.
Remediation
Install update from vendor's website.
References
- https://github.com/torvalds/linux/commit/a0ac402cfcdc904f9772e1762b3fda112dcc56a0
- https://bugzilla.redhat.com/show_bug.cgi?id=1403145
- http://www.openwall.com/lists/oss-security/2016/12/08/19
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.14
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a0ac402cfcdc904f9772e1762b3fda112dcc56a0
- http://www.securityfocus.com/bid/94821
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00041.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00040.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00091.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00088.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00081.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00075.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00072.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00062.html
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00057.html
- https://access.redhat.com/errata/RHSA-2017:2669
- https://access.redhat.com/errata/RHSA-2017:2077
- https://access.redhat.com/errata/RHSA-2017:1842
- http://rhn.redhat.com/errata/RHSA-2017-0817.html