# CVE-2026-96280 — Red Hat Enterprise Linux 10

> As of 2026-09-27, CVE-2026-96280 is a HIGH-severity vulnerability in Red Hat Enterprise Linux 10, CVSS v3.1 7.5. No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-96280 as of 2026-09-27; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-27

## What is CVE-2026-96280?

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.

The record classifies CVE-2026-96280 under weakness class [CWE-197](https://cwe.mitre.org/data/definitions/197.html). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity, availability. 4 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 8 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 7.5 — HIGH (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 3.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-27

## Is CVE-2026-96280 being exploited?

It currently carries a trending score of 30 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [Red Hat](https://intel.threadlinqs.com/vendors/red-hat): Enterprise Linux 10, Enterprise Linux 7, Enterprise Linux 8, Enterprise Linux 9

## How to fix CVE-2026-96280

No vendor patch reference has been recorded for CVE-2026-96280 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-96280

No threat campaign in the Threadlinqs corpus currently references CVE-2026-96280, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org. Last verified by Threadlinqs on 2026-09-28.

**Third-party advisory**

- [access.redhat.com — vdb entry](https://access.redhat.com/security/cve/CVE-2026-96280)
- [bugzilla.redhat.com — issue tracking](https://bugzilla.redhat.com/show_bug.cgi?id=2539419)

**Other references**

- [github.com](https://github.com/flatpak/flatpak/security/advisories/GHSA-jr92-2v97-wgvc)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-96280
Full detection coverage and IOCs for threats exploiting CVE-2026-96280 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp