{"id":"CVE-2026-96280","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-96280","summary":"The OCI delta stream parser read sizes as guint64 but passed them to GLib I/O and allocation functions expecting gsize (32 bits on 32-bit systems), causing undersized allocations while…","details":"The OCI delta stream parser read sizes as guint64 but passed them to GLib I/O and allocation functions expecting gsize (32 bits on 32-bit systems), causing undersized allocations while subsequent operations use the original 64-bit size, leading to heap buffer overflows. An attacker controlling an OCI registry can craft a delta stream that triggers this during flatpak install/update, potentially achieving code execution on 32-bit systems.","published":"2026-09-27T21:17:04.200","modified":"2026-09-27T21:17:04.200","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-96280"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2539419"},{"type":"WEB","url":"https://github.com/flatpak/flatpak/security/advisories/GHSA-jr92-2v97-wgvc"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-27T21:17:04.200"}}