Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.4, < 4.4.11 |
| Canonical | Ubuntu Linux | 14.04 |
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=92117dVendor Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5Vendor Advisory
- http://www.openwall.com/lists/oss-security/2016/05/06/4Mailing ListThird Party Advisory
- http://www.ubuntu.com/usn/USN-3005-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-3006-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-3007-1Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1334303Issue TrackingThird Party Advisory
- https://github.com/torvalds/linux/commit/92117d8443bc5afacc8d5ba82e541946310f106Vendor Advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=92117dVendor Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5Vendor Advisory
- http://www.openwall.com/lists/oss-security/2016/05/06/4Mailing ListThird Party Advisory
- http://www.ubuntu.com/usn/USN-3005-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-3006-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-3007-1Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1334303Issue TrackingThird Party Advisory
FAQ
What is CVE-2016-4558?
CVE-2016-4558 is a vulnerability with a CVSS score of 7.0 (HIGH). 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 c...
How severe is CVE-2016-4558?
CVE-2016-4558 has been rated HIGH with a CVSS base score of 7.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-4558?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Canonical Ubuntu Linux.