{"action":"Upgrade linux to 6.3.7-1 or later.","affected":[{"fixed":"6.3.7-1","introduced":"0"}],"component":"linux","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["6.3.7-1"],"id":"tcs_01M5NJRHWYBXD0PF54FPBPJT8Z","modified_at":"2026-10-26T18:02:48.437969647Z","published_at":"2025-10-04T16:15:52.103Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2023-53566","https://security-tracker.debian.org/tracker/CVE-2023-53566"],"severity":{"label":"medium","score":5.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2023-53566#Debian:13/linux","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2023-53566"}],"summary":"In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_set_rbtree: fix null deref on element insertion There is no guarantee that rb_prev() will not return NULL in nft_rbtr"}