{"id":"DEBIAN-CVE-2026-6426","details":"A type mismatch vulnerability was found in QEMU's vhost inflight migration VMState handling. The destination buffer size is stored as a uint64_t but read by the VMS_VBUFFER load path as a signed int32_t. On little-endian hosts, a crafted incoming migration state with bit 31 set causes the value to be interpreted as negative and then implicitly converted to a very large size_t, leading qemu_get_buffer() to copy migration-stream data beyond the bounds of the mmap-backed inflight region.  This can result in a crash of the QEMU process or memory corruption. Exploitation requires control of the migration producer or write access to the migration channel, combined with a destination configured to use vhost inflight migration.","modified":"2026-09-19T22:47:46.886451953Z","published":"2026-08-10T22:17:10.027Z","upstream":["CVE-2026-6426"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-6426"}],"affected":[{"package":{"name":"qemu","ecosystem":"Debian:12","purl":"pkg:deb/debian/qemu?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:10.0.0+ds-1","1:10.0.0+ds-2","1:10.0.0+ds-2~bpo12+1","1:10.0.0+ds-2~bpo12+2","1:10.0.0~rc0+ds-1","1:10.0.0~rc0+ds-2","1:10.0.0~rc1+ds-1","1:10.0.0~rc1+ds-2","1:10.0.0~rc2+ds-1","1:10.0.0~rc2+ds-2","1:10.0.0~rc3+ds-1","1:10.0.0~rc3+ds-2","1:10.0.2+ds-1","1:10.0.2+ds-2","1:10.0.2+ds-2~bpo12+1","1:10.0.3+ds-1","1:10.0.3+ds-2","1:10.0.3+ds-3","1:10.0.3+ds-4","1:10.1.0+ds-1","1:10.1.0+ds-2","1:10.1.0+ds-3","1:10.1.0+ds-4","1:10.1.0+ds-5","1:10.1.0~rc0+ds-1","1:10.1.0~rc0+ds-2","1:10.1.0~rc0+ds-3","1:10.1.0~rc0+ds-4","1:10.1.0~rc1+ds-1","1:10.1.0~rc1+ds-1a","1:10.1.0~rc1+ds-1b","1:10.1.0~rc1+ds-2","1:10.1.0~rc1+ds-3","1:10.1.0~rc2+ds-1","1:10.1.0~rc3+ds-1","1:10.1.0~rc3+ds-2","1:10.1.1+ds-1","1:10.1.2+ds-1","1:10.1.2+ds-2","1:10.1.2+ds-3","1:10.1.3+ds-1","1:10.2.0+ds-1","1:10.2.0+ds-2","1:10.2.0~rc1+ds-1","1:10.2.1+ds-1","1:10.2.2+ds-1","1:11.0.0+ds-1","1:11.0.0+ds-2","1:11.0.0~rc0+ds-1","1:11.0.0~rc0+ds-2","1:11.0.0~rc1+ds-1","1:11.0.0~rc1+ds-2","1:11.0.0~rc1+ds-3","1:11.0.0~rc2+ds-1","1:11.0.0~rc2+ds-2","1:11.0.0~rc3+ds-1","1:11.0.1+ds-1","1:11.0.2+ds-1","1:11.0.2+ds-2","1:11.0.2+ds-2~bpo13+1","1:11.0.3+ds-1","1:11.0.3+ds-2","1:11.1.0+ds-1","1:11.1.0+ds-2","1:11.1.0~rc0+ds-1","1:11.1.0~rc0+ds-2","1:11.1.0~rc1+ds-1","1:11.1.0~rc3+ds-1","1:11.1.0~rc3+ds-2","1:11.1.1+ds-1","1:7.2+dfsg-7","1:7.2+dfsg-7+deb12u1","1:7.2+dfsg-7+deb12u10","1:7.2+dfsg-7+deb12u11","1:7.2+dfsg-7+deb12u12","1:7.2+dfsg-7+deb12u13","1:7.2+dfsg-7+deb12u14","1:7.2+dfsg-7+deb12u15","1:7.2+dfsg-7+deb12u16","1:7.2+dfsg-7+deb12u17","1:7.2+dfsg-7+deb12u18","1:7.2+dfsg-7+deb12u2","1:7.2+dfsg-7+deb12u2~bpo11+1","1:7.2+dfsg-7+deb12u3","1:7.2+dfsg-7+deb12u4","1:7.2+dfsg-7+deb12u5","1:7.2+dfsg-7+deb12u6","1:7.2+dfsg-7+deb12u7","1:7.2+dfsg-7+deb12u8","1:7.2+dfsg-7+deb12u9","1:8.0+dfsg-1","1:8.0+dfsg-2","1:8.0+dfsg-3","1:8.0+dfsg-4","1:8.0.2+dfsg-1","1:8.0.2+dfsg-2","1:8.0.2+dfsg-3","1:8.0.3+dfsg-1","1:8.0.3+dfsg-1~bpo12+1","1:8.0.3+dfsg-2","1:8.0.3+dfsg-3","1:8.0.3+dfsg-4","1:8.0.3+dfsg-5","1:8.0.4+dfsg-1","1:8.0.4+dfsg-1~bpo12+1","1:8.0.4+dfsg-2","1:8.0.4+dfsg-3","1:8.0~rc2+dfsg-1","1:8.0~rc3+dfsg-1","1:8.0~rc3+dfsg-2","1:8.0~rc4+dfsg-1","1:8.0~rc4+dfsg-2","1:8.1.0+ds-1","1:8.1.0+ds-1~exp1","1:8.1.0+ds-1~exp2","1:8.1.0+ds-2","1:8.1.0+ds-3","1:8.1.0+ds-4","1:8.1.0+ds-5","1:8.1.0+ds-6","1:8.1.0~rc2+dfsg-1","1:8.1.0~rc3+dfsg-1","1:8.1.0~rc3+dfsg-2","1:8.1.0~rc4+ds-1","1:8.1.0~rc4+ds-2","1:8.1.0~rc4+ds-3","1:8.1.0~rc4+ds-4","1:8.1.1+ds-1","1:8.1.1+ds-2","1:8.1.1+ds-2~bpo12+1","1:8.1.2+ds-1","1:8.1.2+ds-1~bpo12+1","1:8.1.3+ds-1","1:8.2.0+ds-1","1:8.2.0+ds-2","1:8.2.0+ds-3","1:8.2.0+ds-4","1:8.2.0+ds-5","1:8.2.0+ds-5~bpo12+1","1:8.2.0~rc0+ds-1","1:8.2.0~rc1+ds-1","1:8.2.0~rc2+ds-1","1:8.2.1+ds-1","1:8.2.1+ds-1~bpo12+1","1:8.2.1+ds-2","1:8.2.2+ds-1","1:8.2.2+ds-2","1:8.2.3+ds-1","1:8.2.3+ds-2","1:8.2.4+ds-1","1:8.2.4+ds-2","1:8.2.5+ds-1","1:8.2.5+ds-2","1:9.0.0~rc0+ds-1","1:9.0.0~rc0+ds-2","1:9.0.0~rc2+ds-1","1:9.0.1+ds-1","1:9.0.1+ds-1~bpo12+1","1:9.0.2+ds-1","1:9.0.2+ds-1~bpo12+1","1:9.0.2+ds-2","1:9.0.2+ds-3","1:9.0.2+ds-4","1:9.0.2+ds-5","1:9.0.2+ds-6","1:9.0.2+ds-7","1:9.1.0+ds-1","1:9.1.0+ds-2","1:9.1.0+ds-3","1:9.1.0+ds-4","1:9.1.0+ds-5","1:9.1.0+ds-6","1:9.1.0+ds-7","1:9.1.0+ds-8","1:9.1.0+ds-9~exp0","1:9.1.0~rc0+ds-1","1:9.1.0~rc0+ds-2","1:9.1.0~rc0+ds-3","1:9.1.1+ds-1","1:9.1.1+ds-2","1:9.1.1+ds-2~bpo12+1","1:9.1.1+ds-3","1:9.1.1+ds-4","1:9.1.1+ds-5","1:9.1.2+ds-1","1:9.1.2+ds-1~bpo12+1","1:9.2.0+ds-1","1:9.2.0+ds-1~exp1","1:9.2.0+ds-2","1:9.2.0+ds-3","1:9.2.0+ds-3~bpo12+1","1:9.2.0+ds-3~bpo12+2","1:9.2.0+ds-4","1:9.2.0+ds-5","1:9.2.0~rc0+ds-1","1:9.2.0~rc3+ds-1","1:9.2.1+ds-1","1:9.2.2+ds-1","1:9.2.2+ds-1~bpo12+1"],"ecosystem_specific":{"urgency":"not 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