HIGH 7.5 NVD
CVE-2026-96280
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 unde
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.
References
- https://access.redhat.com/security/cve/CVE-2026-96280
- https://bugzilla.redhat.com/show_bug.cgi?id=2539419
- https://github.com/flatpak/flatpak/security/advisories/GHSA-jr92-2v97-wgvc
This high severity vulnerability with a CVSS score of 7.5 was published on 2026-09-27 via NVD.
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