| Name | CVE-2026-96280 |
| Description | 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-6432-1 |
| Debian Bugs | 1144130 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| flatpak (PTS) | bookworm, bookworm (security) | 1.14.10-1~deb12u2 | vulnerable |
| trixie | 1.16.6-1~deb13u2 | fixed | |
| trixie (security) | 1.16.6-1~deb13u3 | fixed | |
| forky, sid | 1.18.4-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| flatpak | source | trixie | 1.16.6-1~deb13u2 | DSA-6432-1 | ||
| flatpak | source | (unstable) | 1.18.1-1 | 1144130 |
https://github.com/flatpak/flatpak/security/advisories/GHSA-jr92-2v97-wgvc
Fixed by: https://github.com/flatpak/flatpak/commit/892d261255449d0cd5d97f6a8f2a731e566ff913 (1.18.1)
Fixed by: https://github.com/flatpak/flatpak/commit/c52e851f3f5036b132321c19b3c0102aabda9a3a (1.18.1)
Fixed by: https://github.com/flatpak/flatpak/commit/f710ca12a056678822adf346fed9c2139dd498c7 (1.18.1)
Fixed by: https://github.com/flatpak/flatpak/commit/6be548dd3ac780407ff3cc5824eb9d2acb9f406a (branch flatpak-1.16.x)
Fixed by: https://github.com/flatpak/flatpak/commit/592e8c6704d310e3b6418caff52e0cc85271c8e3 (branch flatpak-1.16.x)
Fixed by: https://github.com/flatpak/flatpak/commit/a79764d78b29aa592b612061071b2c361bda4f9e (branch flatpak-1.16.x)