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

netfilter: xt_connmark: reject invalid shift parameters

Revision 2 of the CONNMARK target accepts user-controlled shift
parameters and applies them to 32-bit mark values in
connmark_tg_shift().

A shift_bits value of 32 or more triggers an undefined-shift bug when
the rule is evaluated. Invalid shift_dir values are also accepted and
silently fall back to the left-shift path.

Reject invalid revision-2 shift parameters in connmark_tg_check() so
malformed rules fail at installation time, before they can reach the
packet path.

https://git.kernel.org/stable/c/1b47026fb4b35bac850ad6e8a4ad7fc018e09ebc

https://git.kernel.org/stable/c/230173cc6105bdfb2696d37e6e56687b003fbe63

https://git.kernel.org/stable/c/4eef84b09a3836919360c4232b0f16651a155eec

https://git.kernel.org/stable/c/8ace320ac4416f5e5fbcd065309fb2dfcce787b0

https://git.kernel.org/stable/c/9657bb11a6376ab0a79f05d433713d6944111e9d

https://git.kernel.org/stable/c/c3fa852d117b3fda72265e4230e3967db4a74fcf

https://git.kernel.org/stable/c/d8ce63d928b457fba7ed1e302492dfd32293671c

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