CVE-2017-15537 Information

Description

The x86/fpu (Floating Point Unit) subsystem in the Linux kernel before 4.13.5 when a processor supports the xsave feature but not the xsaves feature does not correctly handle attempts to set reserved bits in the xstate header via the ptrace() or rt_sigreturn() system call allowing local users to read the FPU registers of other processes on the system related to arch/x86/kernel/fpu/regset.c and arch/x86/kernel/fpu/signal.c.

CVSS Vector

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

Reference

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=814fb7bb7db5433757d76f4c4502c96fc53b0b5e http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5 https://github.com/torvalds/linux/commit/814fb7bb7db5433757d76f4c4502c96fc53b0b5e https://source.android.com/security/bulletin/pixel/2018-01-01

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

5.5