All vulnerabilities
CVE-2026-96280GHSA-jr92-2v97-wgvc

Red Hat Enterprise Linux 10: Flatpak: flatpak: buffer overflow in oci delta stream path names on 32-bit systems

Red Hat Red Hat Enterprise Linux 10Operating systems
Open in ThreatlineRecord JSON
CVSS
7.5High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.66%Chance of exploitation activity in the next 30 days, higher than 51% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published27 Sep 2026Updated 12 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Description

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.

Text from CVE List

Affected versions 3

  • Red Hat Enterprise Linux 10unaffected: 0:1.16.0-9.el10_2.4 and laterCVE List
  • Red Hat Enterprise Linux 8unaffected: 0:1.12.9-7.el8_10 and laterCVE List
  • Red Hat Enterprise Linux 9unaffected: 0:1.12.9-4.el9_8.4 and laterCVE List

References 6