Numeric Truncation Error Affecting flatpak-session-helper package, versions <0:1.12.9-4.el9_8.4


Severity

Recommended
0.0
high
0
10

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.67% (51st percentile)

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  • Snyk IDSNYK-ROCKY9-FLATPAKSESSIONHELPER-20930629
  • published14 Oct 2026
  • disclosed27 Sept 2026

Introduced: 27 Sep 2026

NewCVE-2026-96280  (opens in a new tab)
CWE-197  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:9 flatpak-session-helper to version 0:1.12.9-4.el9_8.4 or higher.
This issue was patched in RLSA-2026:80497.

NVD Description

Note: Versions mentioned in the description apply only to the upstream flatpak-session-helper package and not the flatpak-session-helper package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:9 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1