CVE-2026-96280
Flatpak: flatpak: buffer overflow in oci delta stream path names on 32-bit systems
CVSS Score
7.5
EPSS Score
0.6%
EPSS Percentile
48th
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.
| CWE | CWE-197 |
| Vendor | red hat |
| Product | red hat enterprise linux 10 |
| Published | Sep 27, 2026 |
| Last Updated | Nov 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 10.0 Extended Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 7 Extended Lifecycle Support
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
All versions affected Red Hat / Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
All versions affected Red Hat / Red Hat Enterprise Linux 8.8 Telecommunications Update Service
All versions affected Red Hat / Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
All versions affected Red Hat / Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
All versions affected Red Hat / Red Hat Enterprise Linux 9.6 Extended Update Support
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2026:80497 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:80498 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:80687 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:89733 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:90364 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:92221 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:92369 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:95493 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:98112 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:98127 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:98490 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:98595 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:99010 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-96280 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2539419 github.com: https://github.com/flatpak/flatpak/security/advisories/GHSA-jr92-2v97-wgvc
Credits
Upstream acknowledges Sebastian Wick as the original reporter.