{"action":"Upgrade linux to 5.3.7-1 or later.","affected":[{"fixed":"5.3.7-1","introduced":"0"}],"component":"linux","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["5.3.7-1"],"id":"tcs_01M5NE1YWMJJ04Z0M04JTRXJ0K","modified_at":"2026-09-21T07:02:34.793446403Z","published_at":"2019-11-21T02:15:23.273Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2019-19036","https://security-tracker.debian.org/tracker/CVE-2019-19036"],"severity":{"label":"medium","score":5.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2019-19036","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2019-19036"}],"summary":"btrfs_root_node in fs/btrfs/ctree.c in the Linux kernel through 5.3.12 allows a NULL pointer dereference because rcu_dereference(root->node) can be zero."}