OCI Delta Stream Parser Reads Sizes as 64-Bit Values but Passes Them to 32-Bit GLib Functions, Causing Truncation on 32-Bit Systems
Last refreshed2026-10-30
Status: UPDATED
| Advisory ID: CVE-2026-96280
Key Details
CVE
CVE-2026-96280
CVSS Score / Version
7.5 (High) / CVSS v3.1
Updated
2026-10-29
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS Prose
attack vector is network; attack complexity is high; privileges required is none; user interaction is required; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products
Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, and Red Hat Enterprise Linux 7
Classified as
CWE-197 (Numeric Truncation Error)
Exploitation prediction (EPSS)
0.66% probability of exploitation in the next 30 days (51% percentile) -- FIRST.org's EPSS model.
Affected Products, Subsystems & Sectors
Vendor
Product
Affected Versions
Patch Status
Red Hat
Red Hat Enterprise Linux 10
Red Hat
Red Hat Enterprise Linux 8
Red Hat
Red Hat Enterprise Linux 9
Red Hat
Red Hat Enterprise Linux 7
Subsystems
OT Supporting Infrastructure
Sectors
Multiple
What to Know
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. (NVD)
What to Do
Monitor Red Hat's web page for any future patch releases.