CVE-2016-2383

MEDIUM

Linux kernel <4.5 - Info Disclosure

Title source: llm

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.

References (8)

[Patch, Vendor Advisory] http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a1b14d27ed0965838350f1377ff97c93ee383492

[Third Party Advisory] http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00015.html

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2016/02/14/1

[Third Party Advisory] http://www.ubuntu.com/usn/USN-2947-1

[Third Party Advisory] http://www.ubuntu.com/usn/USN-2947-2

[Third Party Advisory] http://www.ubuntu.com/usn/USN-2947-3

[Issue Tracking, Third Party Advisory] https://bugzilla.redhat.com/show_bug.cgi?id=1308452

[Patch, Third Party Advisory] https://github.com/torvalds/linux/commit/a1b14d27ed0965838350f1377ff97c93ee383492

Scores

CVSS v3 5.5

EPSS 0.0008

EPSS Percentile 24.5%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Classification

Status draft

Affected Products (7)

linux/linux_kernel < 4.5.0

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

canonical/ubuntu_linux

canonical/ubuntu_linux

opensuse/leap

Timeline

Published Apr 27, 2016

Tracked Since Feb 18, 2026