Denial of Service Vulnerability in Linux Kernel's xsave/xrstor Implementation

CVE-2015-2672 · MEDIUM Severity

AV:L/AC:L/AU:N/C:N/I:N/A:C

The xsave/xrstor implementation in arch/x86/include/asm/xsave.h in the Linux kernel before 3.19.2 creates certain .altinstr_replacement pointers and consequently does not provide any protection against instruction faulting, which allows local users to cause a denial of service (panic) by triggering a fault, as demonstrated by an unaligned memory operand or a non-canonical address memory operand.

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