CVE-2016-9576

Description

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.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.07%
Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory kernel.org Vendor Advisory kernel.org Vendor Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00057.html vendor advisory mailing list third party advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00088.html vendor advisory mailing list third party advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a0ac402cfcdc904f9772e1762b3fda112dcc56a0 patch vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00040.html vendor advisory mailing list third party advisory
https://github.com/torvalds/linux/commit/a0ac402cfcdc904f9772e1762b3fda112dcc56a0 patch vendor advisory
https://access.redhat.com/errata/RHSA-2017:2669 third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00072.html vendor advisory mailing list third party advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00041.html vendor advisory mailing list third party advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00062.html vendor advisory mailing list third party advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00075.html vendor advisory mailing list third party advisory
http://rhn.redhat.com/errata/RHSA-2017-0817.html third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00081.html vendor advisory mailing list third party advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1403145 third party advisory issue tracking
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.14 release notes vendor advisory
http://www.openwall.com/lists/oss-security/2016/12/08/19 patch mailing list third party advisory
https://access.redhat.com/errata/RHSA-2017:2077 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2017:1842 third party advisory vendor advisory
http://www.securityfocus.com/bid/94821 third party advisory vdb entry
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00091.html vendor advisory mailing list third party advisory

Frequently Asked Questions

What is the severity of CVE-2016-9576?
CVE-2016-9576 has been scored as a high severity vulnerability.
How to fix CVE-2016-9576?
To fix CVE-2016-9576, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-9576 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2016-9576 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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