CVE-2016-4558

Severity

69%

Complexity

34%

Confidentiality

165%

CWE-416: Use After Free

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.

CWE-416: Use After Free

CVSS 3.0 Base Score 7. CVSS Attack Vector: local. CVSS Attack Complexity: high. CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 6.9. CVSS Attack Vector: local. CVSS Attack Complexity: medium. CVSS Vector: (AV:L/AC:M/Au:N/C:C/I:C/A:C).

Overview

Type

Linux

First reported 8 years ago

2016-05-23 10:59:00

Last updated 8 years ago

2016-08-02 18:43:00

Affected Software

Linux Kernel

Canonical Ubuntu Linux 14.04 LTS (Long-Term Support)

14.04

Canonical Ubuntu Linux 16.04 LTS (Long-Term Support)

16.04

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=92117d8443bc5afacc8d5ba82e541946310f106e

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5

[oss-security] 20160506 CVE Requests: Linux: BPF flaws (one use-after-free / local root privilege escalation)

USN-3005-1

Third Party Advisory

USN-3006-1

Third Party Advisory

USN-3007-1

Third Party Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=1334303

Issue Tracking, Third Party Advisory

https://github.com/torvalds/linux/commit/92117d8443bc5afacc8d5ba82e541946310f106e

Vendor Advisory

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