In the Linux kernel, the following vulnerability has been resolved:

netfilter: ebtables: zero chainstack array

sashiko reports:
 looking at ebtables table
 translation, could a sparse cpu_possible_mask lead to an uninitialized pointer
 free?

 If cpu_possible_mask is sparse (for example, CPU 0 and CPU 2 are possible,
 but CPU 1 is not), the allocation loop skips CPU 1. If vmalloc_node() fails at
 CPU 2, the cleanup loop will blindly decrement and call vfree() on
 newinfo->chainstack[1].

Not a real-world bug, such allocation isn't expected to fail
in the first place.

https://git.kernel.org/stable/c/29bf41a9b59aff9f6197df58641a00037d567ca8

https://git.kernel.org/stable/c/2ade612967e2cdfb9290ebcb773f302c82f311fa

https://git.kernel.org/stable/c/42bef500d07b5769d916e9122a3e3fa3fd2245ef

https://git.kernel.org/stable/c/5ee856e4208acafaaaf7b84824d39b78c21345d6

https://git.kernel.org/stable/c/9e6c5169db423e51dcc66a73fd15409c0d38e088

https://git.kernel.org/stable/c/9f74d28e903fa4fdf82f870d0aeadddc8196e41c

https://git.kernel.org/stable/c/cbfe53599eebffd188938ab6774cc41794f6f9d5

https://git.kernel.org/stable/c/fc7f105451044501a50cfd530cfa3b472c54acbc

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