high · 7.5

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…

CVE-2026-96280 · EUVD-2026-88015 · published 27 Sept 2026

How serious is it

  • Severity: high, CVSS score 7.5 out of 10.
  • No exploit prediction (EPSS) score yet.
  • Not on the CISA list of exploited vulnerabilities.
  • No public exploit in Exploit-DB.

Is your app affected by CVE-2026-96280?

Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.

Who is affected

  • Red Hat Red Hat Enterprise Linux 9: patch: 0:1.12.9-4.el9_8.4
  • Red Hat Red Hat Enterprise Linux 8: patch: 0:1.12.9-7.el8_10
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support: patch: 0:1.12.9-4.el9_6.5
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions: patch: 0:1.12.9-3.el9_4.5
  • Red Hat Red Hat Enterprise Linux 10: patch: 0:1.16.0-9.el10_2.4

How to check

  1. Find out whether you run the affected product and which version, then compare it with the versions above.

How to fix

Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
  1. Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
  2. If a vulnerable version was live, check your logs and rotate the secrets that server could read.

The advisory

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.

Check your whole app

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References

Merged from ENISA EUVD. Last updated 27 Oct 2026. All vulnerabilities · RSS · JSON

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