{"action":"Upgrade linux-6.12 to 6.12.100-1~deb12u1 or later.","affected":[{"fixed":"6.12.100-1~deb12u1","introduced":"0"}],"component":"linux-6.12","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["6.12.100-1~deb12u1"],"id":"tcs_01M5NTGCCVVT16TKRTRW6QPYVX","modified_at":"2026-10-01T03:03:48.185380019Z","published_at":"2026-07-25T10:17:23.397Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-64399","https://security-tracker.debian.org/tracker/CVE-2026-64399"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-64399#Debian:12/linux-6.12","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-64399"}],"summary":"In the Linux kernel, the following vulnerability has been resolved: ksmbd: add permission checks for FSCTL_DUPLICATE_EXTENTS_TO_FILE The FSCTL_DUPLICATE_EXTENTS_TO_FILE arm of smb2_ioctl() overwrites"}