Hi Michal, thanks for looking into it. I bisected as suggested. The issue was first introduced with kernel-source.git commit: ``` 8ba3bb46ac3e63ce1a0d2e07ddbe5b47c9bf7f36 netfilter: nf_tables: restore set elements when delete set fails (CVE-2024-27012 bsc#1223804). ``` Which correlates to upstream linux.git commit: ``` e79b47a8615d42c68aaeb68971593333667382ed netfilter: nf_tables: restore set elements when delete set fails ``` There is a follow-up linux.git commit which seems interesting as the trace in its description is similar to the one observed by me: ``` 86a1471d7cde792941109b93b558b5dc078b9ee9 netfilter: nf_tables: fix memleak in map from abort path ``` I will test it.