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Change History

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

netfilter: nf_tables: fix underflow in chain reference counter

Set element addition error path decrements reference counter on chains
twice: once on element release and again via nft_data_release().

Then, d6b478666ffa ("netfilter: nf_tables: fix underflow in object
reference counter") incorrectly fixed this by removing the stateful
object reference count decrement.

Restore the stateful object decrement as in b91d90368837 ("netfilter:
nf_tables: fix leaking object reference count") and let
nft_data_release() decrement the chain reference counter, so this is
done only once.

https://git.kernel.org/stable/c/9c959671abc7d4ffdf34eed10c64492d43cb6a3c

https://git.kernel.org/stable/c/b068314fd8ce751a7f906e55bb90f3551815f1a0

https://git.kernel.org/stable/c/b389139f12f287b8ed2e2628b72df89a081f0b59