{"action":"Upgrade linux to 6.1.176-1 or later.","affected":[{"fixed":"6.1.176-1","introduced":"0"}],"component":"linux","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["6.1.176-1"],"id":"tcs_01M5NTCAB5R6ZEW2ZT42KG8MZG","modified_at":"2026-10-23T18:05:03.075031516Z","published_at":"2026-07-19T16:17:38.943Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-63994","https://security-tracker.debian.org/tracker/CVE-2026-63994"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-63994","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-63994"}],"summary":"In the Linux kernel, the following vulnerability has been resolved: tunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp[v6]() Sashiko found that iptunnel_pmtud_build_icmp() and"}