Note:
This project will be discontinued after December 13, 2021. [more]
2017-10-17
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.
Products | Linux_kernel |
Type | Information Exposure (CWE-200) |
First patch |
https://github.com/torvalds/linux/commit/814fb7bb7db5433757d76f4c4502c96fc53b0b5e |
Relevant file/s |
• ./arch/x86/kernel/fpu/regset.c (modified, +4)
• ./arch/x86/kernel/fpu/signal.c (modified, +7, -2) |
Links |
• https://source.android.com/security/bulletin/pixel/2018-01-01
• http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5 • http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=814fb7bb7db5433757d76f4c4502c96fc53b0b5e |
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