CVE-2015-3291

Description

arch/x86/entry/entry_64.S in the Linux kernel before 4.1.6 on the x86_64 platform does not properly determine when nested NMI processing is occurring, which allows local users to cause a denial of service (skipped NMI) by modifying the rsp register, issuing a syscall instruction, and triggering an NMI.

Category

2.1
CVSS
Severity: Low
CVSS 2.0 •
EPSS 0.08%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory debian.org Vendor Advisory ubuntu.com Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1243489
http://www.securityfocus.com/bid/76003 vdb entry
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=810bc075f78ff2c221536eb3008eac6a492dba2d
https://github.com/torvalds/linux/commit/810bc075f78ff2c221536eb3008eac6a492dba2d
http://www.ubuntu.com/usn/USN-2689-1 vendor advisory
http://www.ubuntu.com/usn/USN-2690-1 vendor advisory
http://www.ubuntu.com/usn/USN-2691-1 vendor advisory
http://www.ubuntu.com/usn/USN-2688-1 vendor advisory
http://www.debian.org/security/2015/dsa-3313 vendor advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.1.6 vendor advisory
http://www.openwall.com/lists/oss-security/2015/07/22/7 mailing list
http://www.ubuntu.com/usn/USN-2687-1 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2015-3291?
CVE-2015-3291 has been scored as a low severity vulnerability.
How to fix CVE-2015-3291?
To fix CVE-2015-3291, 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-2015-3291 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2015-3291 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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