CVE-2016-9178

Description

The __get_user_asm_ex macro in arch/x86/include/asm/uaccess.h in the Linux kernel before 4.7.5 does not initialize a certain integer variable, which allows local users to obtain sensitive information from kernel stack memory by triggering failure of a get_user_ex call.

Category

5.5
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.04%
Third-Party Advisory kernel.org Third-Party Advisory openwall.com Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/torvalds/linux/commit/1c109fabbd51863475cd12ac206bdd249aee35af issue tracking third party advisory patch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1c109fabbd51863475cd12ac206bdd249aee35af issue tracking third party advisory patch
http://www.openwall.com/lists/oss-security/2016/11/04/4 third party advisory mailing list
https://bugzilla.redhat.com/show_bug.cgi?id=1391908 issue tracking
http://www.securityfocus.com/bid/94144 vdb entry
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.7.5 release notes

Frequently Asked Questions

What is the severity of CVE-2016-9178?
CVE-2016-9178 has been scored as a medium severity vulnerability.
How to fix CVE-2016-9178?
To fix CVE-2016-9178, 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-2016-9178 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2016-9178 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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