CVE-2016-2383
MEDIUM severity · CVSS 5.5
5.5CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactNone
Availability impactNone
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a1b14d27ed0965838350f1377ff97c93ee383492 ↗
Additional information
- NVD record
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a1b14d27ed0965838350f1377ff97c93ee383492Patch
- https://github.com/torvalds/linux/commit/a1b14d27ed0965838350f1377ff97c93ee383492Patch
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00015.htmlAdvisory
- http://www.openwall.com/lists/oss-security/2016/02/14/1Advisory
- http://www.ubuntu.com/usn/USN-2947-1Advisory
- http://www.ubuntu.com/usn/USN-2947-2Advisory
- http://www.ubuntu.com/usn/USN-2947-3Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1308452Advisory