Vulnerability Description
The adjust_branches function in kernel/bpf/verifier.c in the Linux kernel before 4.5 does not consider the delta in the backward-jump case, which allows local users to obtain sensitive information from kernel memory by creating a packet filter and then loading crafted BPF instructions.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 4.5.0 |
| Canonical | Ubuntu Linux | 14.04 |
| Opensuse | Leap | 42.1 |
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a1b14dPatchVendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00015.htmlThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/02/14/1Mailing ListThird Party Advisory
- http://www.ubuntu.com/usn/USN-2947-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-2947-2Third Party Advisory
- http://www.ubuntu.com/usn/USN-2947-3Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1308452Issue TrackingThird Party Advisory
- https://github.com/torvalds/linux/commit/a1b14d27ed0965838350f1377ff97c93ee38349PatchThird Party Advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a1b14dPatchVendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00015.htmlThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/02/14/1Mailing ListThird Party Advisory
- http://www.ubuntu.com/usn/USN-2947-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-2947-2Third Party Advisory
- http://www.ubuntu.com/usn/USN-2947-3Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1308452Issue TrackingThird Party Advisory
FAQ
What is CVE-2016-2383?
CVE-2016-2383 is a vulnerability with a CVSS score of 5.5 (MEDIUM). The adjust_branches function in kernel/bpf/verifier.c in the Linux kernel before 4.5 does not consider the delta in the backward-jump case, which allows local users to obtain sensitive information fro...
How severe is CVE-2016-2383?
CVE-2016-2383 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-2383?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Canonical Ubuntu Linux, Opensuse Leap.