Vulnerability in Linux Kernel
CVE-2016-4558
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (57.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Linux Kernel
- Canonical Ubuntu Linux — versions 14.04, 16.04
Public proof-of-concept exploits
References
- www.ubuntu.com/usn/USN-3006-1 (vendor-advisory, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- www.ubuntu.com/usn/USN-3005-1 (vendor-advisory, Third Party Advisory)
- github.com/torvalds/linux/commit/92117d8443bc5afacc8d5ba82e541946310f106e (Vendor Advisory)
- www.ubuntu.com/usn/USN-3007-1 (vendor-advisory, Third Party Advisory)
- www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5 (Vendor Advisory)
- www.openwall.com/lists/oss-security/2016/05/06/4 (mailing-list, Mailing List, Third Party Advisory)
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2016-4558?
- CVE-2016-4558 is a high-severity vulnerability in Linux Kernel. CVSS score: 7.0/10. Published 2016-05-23.
- How severe is CVE-2016-4558?
- High severity. CVSS v3 base score is 7.0 out of 10.
- Is CVE-2016-4558 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.