CVE-2017-8797
HighSummary
The NFSv4 server in the Linux kernel before 4.11.3 does not properly validate the layout type when processing the NFSv4 pNFS GETDEVICEINFO or LAYOUTGET operand in a UDP packet from a remote attacker. This uninitialized type value leads to an OOPS and eventually a DoS of knfsd and a soft-lockup of the whole system.
Risk Assessment
An attacker can exploit this vulnerability to remotely trigger an error, leading to the unavailability of the NFS service and potential system lockup.
Recommendation
It is recommended to update the Linux kernel to version 4.11.3 or later to mitigate this vulnerability.
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Original NVD description (English source)
The NFSv4 server in the Linux kernel before 4.11.3 does not properly validate the layout type when processing the NFSv4 pNFS GETDEVICEINFO or LAYOUTGET operand in a UDP packet from a remote attacker. This type value is uninitialized upon encountering certain error conditions. This value is used as an array index for dereferencing, which leads to an OOPS and eventually a DoS of knfsd and a soft-lockup of the whole system.

