CVE-2023-53304

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> netfilter: nft_set_rbtree: fix overlap expiration walk<br /> <br /> The lazy gc on insert that should remove timed-out entries fails to release<br /> the other half of the interval, if any.<br /> <br /> Can be reproduced with tests/shell/testcases/sets/0044interval_overlap_0<br /> in nftables.git and kmemleak enabled kernel.<br /> <br /> Second bug is the use of rbe_prev vs. prev pointer.<br /> If rbe_prev() returns NULL after at least one iteration, rbe_prev points<br /> to element that is not an end interval, hence it should not be removed.<br /> <br /> Lastly, check the genmask of the end interval if this is active in the<br /> current generation.