CVE-2016-6516 Information

Description

Race condition in the ioctl_file_dedupe_range function in fs/ioctl.c in the Linux kernel through 4.7 allows local users to cause a denial of service (heap-based buffer overflow) or possibly gain privileges by changing a certain count value aka a \double fetch\ vulnerability.

CVSS Vector

CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=10eec60ce79187686e052092e5383c99b4420a20 http://www.openwall.com/lists/oss-security/2016/07/31/6 http://www.securityfocus.com/bid/92259 https://bugzilla.redhat.com/show_bug.cgi?id=1362457 https://github.com/torvalds/linux/commit/10eec60ce79187686e052092e5383c99b4420a20

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.4