CVE-2016-4558

Description

The BPF subsystem in the Linux kernel before 4.5.5 mishandles reference counts, which allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via a crafted application on (1) a system with more than 32 Gb of memory, related to the program reference count or (2) a 1 Tb system, related to the map reference count.

7.0

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.27%

Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory kernel.org Vendor Advisory kernel.org Vendor Advisory github.com

Affected: n/a n/a

References

Link	Tags
http://www.ubuntu.com/usn/USN-3006-1	third party advisory vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1334303	third party advisory issue tracking
http://www.ubuntu.com/usn/USN-3005-1	third party advisory vendor advisory
https://github.com/torvalds/linux/commit/92117d8443bc5afacc8d5ba82e541946310f106e	vendor advisory
http://www.ubuntu.com/usn/USN-3007-1	third party advisory vendor advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5	vendor advisory
http://www.openwall.com/lists/oss-security/2016/05/06/4	third party advisory mailing list
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=92117d8443bc5afacc8d5ba82e541946310f106e	vendor advisory

Frequently Asked Questions

What is the severity of CVE-2016-4558?: CVE-2016-4558 has been scored as a high severity vulnerability.
How to fix CVE-2016-4558?: To fix CVE-2016-4558, 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-2016-4558 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2016-4558 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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