CVE-2016-4558

23Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendepss 0.9%

from disclosure to weapon0 days

Published on NVDMay 23

1st PoCMay 4

exploitation probability

0.9%top 45% of all CVEs

observed exploitation

nono source reports it

1 public exploit(s)

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.

Affected products

n/a · n/a

public PoCs found — 1✓ VexDay Proof

exploitdb✓ VexDay Proofwww.exploit-db.com/exploits/39773

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

References

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