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.
Metrics
Affected Vendors & Products
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
Only install applications from trusted OCI registries. Flatpak remotes using the default OSTree transport are not affected.
References
History
Sun, 27 Sep 2026 21:15:00 +0000
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| Metrics |
cvssV3_1
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Sun, 27 Sep 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
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| 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. | |
| Title | Flatpak: flatpak: buffer overflow in oci delta stream path names on 32-bit systems | |
| First Time appeared |
Redhat
Redhat enterprise Linux |
|
| Weaknesses | CWE-197 | |
| CPEs | cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:7 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9 |
|
| Vendors & Products |
Redhat
Redhat enterprise Linux |
|
| References |
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Projects
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-09-27T21:00:17.108Z
Reserved: 2026-09-22T20:43:35.900Z
Link: CVE-2026-96280
No data.
Status : Received
Published: 2026-09-27T21:17:04.200
Modified: 2026-09-27T21:17:04.200
Link: CVE-2026-96280
No data.
OpenCVE Enrichment
Updated: 2026-09-27T22:30:17Z
Weaknesses