CVE-2026-96280Flatpak: flatpak: buffer overflow in oci delta stream path names on 32-bit systems
Updated under an hour ago ()
Does this affect you?
It affects Red Hat Enterprise Linux 10 and 1 other product. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.60%, higher than 47% of scored CVEs.
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Free account, 1 product
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
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-197
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.60% (percentile 47)
- Assigned by
- redhat
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | from 0:1.16.0-9.el10_2.4 not affected | CNA record |
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support redhat:rhel_eus | from 0:1.12.9-4.el9_6.5 not affected | CNA record |
References
- https://access.redhat.com/errata/RHSA-2026:80497vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:80498vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:80687vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:89733vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-96280vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2539419issue-tracking, x-refsource-redhat
- https://github.com/flatpak/flatpak/security/advisories/GHSA-jr92-2v97-wgvc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.