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.
Exploits (1)
exploitdb
WORKING POC
VERIFIED
by Google Security Research · textdoslinux
https://www.exploit-db.com/exploits/39773
References (8)
Core 8
Core References
Third Party Advisory vendor-advisory
x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-3006-1
Issue Tracking, Third Party Advisory x_refsource_confirm
https://bugzilla.redhat.com/show_bug.cgi?id=1334303
Third Party Advisory vendor-advisory
x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-3005-1
Vendor Advisory x_refsource_confirm
https://github.com/torvalds/linux/commit/92117d8443bc5afacc8d5ba82e541946310f106e
Third Party Advisory vendor-advisory
x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-3007-1
Vendor Advisory x_refsource_confirm
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
http://www.openwall.com/lists/oss-security/2016/05/06/4
Vendor Advisory x_refsource_confirm
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=92117d8443bc5afacc8d5ba82e541946310f106e
Scores
CVSS v3
7.0
EPSS
0.0027
EPSS Percentile
50.5%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Details
Status
published
Products (3)
canonical/ubuntu_linux
14.04
canonical/ubuntu_linux
16.04
linux/linux_kernel
4.4 - 4.4.11
Published
May 23, 2016
Tracked Since
Feb 18, 2026