Vulnerability: Denial of Service and Uninitialized Memory Access in Linux Kernel 4.11.x through 4.11-rc7

CVE-2017-7979 · HIGH Severity

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

The cookie feature in the packet action API implementation in net/sched/act_api.c in the Linux kernel 4.11.x through 4.11-rc7 mishandles the tb nlattr array, which allows local users to cause a denial of service (uninitialized memory access and refcount underflow, and system hang or crash) or possibly have unspecified other impact via "tc filter add" commands in certain contexts. NOTE: this does not affect stable kernels, such as 4.10.x, from kernel.org.

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