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Linux Kernel FPU/SSE Environment Restoration MXCSR Register Corruption Vulnerability
The Linux Kernel FPU/SSE environment restoration code has been reported prone to a vulnerability that could lead to a local denial of service. When the kernel is attempting to restore FPU/SSE state information previously stored using the FXSAVE instruction, an exceptional condition may occur that could cause the contents of the MXCSR register to be corrupted. This could potentially cause a reserved bit within the register to be unexpectedly set, effectively triggering a general protection fault to occur within the kernel, causing it to crash. Successful exploitation of this issue could potentially allow an unprivileged attacker to crash an affected system. |
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