{"action":"Upgrade qemu to 1:2.6+dfsg-2 or later.","affected":[{"fixed":"1:2.6+dfsg-2","introduced":"0"}],"component":"qemu","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["1:2.6+dfsg-2"],"id":"tcs_01M5NBK1K66JWA58WC957WY2RW","modified_at":"2026-09-22T07:01:17.202374652Z","published_at":"2016-05-25T15:59:04.927Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2016-4020","https://security-tracker.debian.org/tracker/CVE-2016-4020"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2016-4020#Debian:13/qemu","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2016-4020"}],"summary":"The patch_instruction function in hw/i386/kvmvapic.c in QEMU does not initialize the imm32 variable, which allows local guest OS administrators to obtain sensitive information from host stack memory b"}